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NSYSU
1.
Wu, Kun-Shain.
Fabrication and Application of Capillary Optical Fiber and Microstructure Fiber.
Degree: Master, Electro-Optical Engineering, 2011, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0825111-145305 
► v Abstract This study was developed using fiber drawing tower to fabricate various types of capillary fiber and microstructured fiber. For example, different diameter sizes,…
(more)
▼ v
Abstract
This study was developed using
fiber drawing tower to fabricate
various types of capillary
fiber and microstructured
fiber. For example,
different diameter sizes, different thickness, different internal diameter
ratio of the capillary
fiber and capillary tube, single ring and double
ring hexagonal arrangement of the air-holes microstructured
fiber.
Trying different ways to create complex structures preform, we
use the stack - drawing - cutting way, is now able to produce only
simple pressure can be achieved by the complex structure of the
preform, compared to drilling way, we can effectively reduce the
production costs of 80%. Now successfully produced a single ring and
double ring hexagonal air holes arranged in preform which has been
drawn into standard
fiber. Depending on the optical properties, we can
use quartz tube with a row of self-developed method to produce most
of the complex structure of the preform. However, each
fiber is still
not very uniform about the pores, which we need to improve in the
manufacturing process of
fiber drawing. Produce more diverse system
and much homogeneous microstructured
fiber as the goal. Application is to use the self-fabricated capillary tube, after
processing, the production target into a low-loss device, then inject
different materials within the devices, and do the different optical
measurements for our devices.
Advisors/Committee Members: Wood-Hi Cheng (chair), Jau- Sheng Wang (committee member), Chin-Ping Yu (chair).
Subjects/Keywords: preform; fiber; microstructured fiber; capillary optical fiber
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APA (6th Edition):
Wu, K. (2011). Fabrication and Application of Capillary Optical Fiber and Microstructure Fiber. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0825111-145305
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wu, Kun-Shain. “Fabrication and Application of Capillary Optical Fiber and Microstructure Fiber.” 2011. Thesis, NSYSU. Accessed September 20, 2019.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0825111-145305.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wu, Kun-Shain. “Fabrication and Application of Capillary Optical Fiber and Microstructure Fiber.” 2011. Web. 20 Sep 2019.
Vancouver:
Wu K. Fabrication and Application of Capillary Optical Fiber and Microstructure Fiber. [Internet] [Thesis]. NSYSU; 2011. [cited 2019 Sep 20].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0825111-145305.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wu K. Fabrication and Application of Capillary Optical Fiber and Microstructure Fiber. [Thesis]. NSYSU; 2011. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0825111-145305
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Shaik, Khadar Vali.
Impact testing of advanced ceramic composites using
experimental and F E analysis.
Degree: 2010, Jawaharlal Nehru Technological University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/2680
► The increasing use of advanced Ceramic Composites in Aircrafts, Automobiles, Missile Systems and Space Structures has been well documented and continuously receiving the wide attention…
(more)
▼ The increasing use of advanced Ceramic Composites
in Aircrafts, Automobiles, Missile Systems and Space Structures has
been well documented and continuously receiving the wide attention
of industry. The structural engineer needs to be familiar with the
property of the composite material structures. The behavior of
ceramic composite material under impact load plays a pivotal role
in designing such structures. An impact test is a test for
determining the energy absorbed in fracturing a test piece at high
velocity. The impact resistance of a part is, in many applications,
a critical measure of service life. In the current work, an attempt
is made to present the dynamic behavior of the advanced ceramic
composite material, i.e., 3 Dimensional Carbon-Silicon Carbide (3D
C-SiC) under the impact, tensile and flexure loads and the
mechanical properties, viz., Impact Strength, Tensile Strength and
Flexural Strength are determined. In 3Dimensional Geometric
Modeling, the spatial orientation of the yarn is explained and the
geometric parameters are estimated. 3D C-SiC composite specimens
with a fiber volume fraction of 40% are prepared by Liquid Silicon
Infiltration (LSI) process to 3 conduct the required experiments
for evaluating the mechanical properties. The experimental results
of impact, tensile, flexure and shear strengths recorded during the
tests are 26.82 kJ/m2, 70.2 MPa, 230.3 MPa and 30.5 MPa
respectively. Computer simulations by using ANSYS 11.0 software
gave very consistent results with a variation of approximately 1-4
% which can be considered as an acceptable range.
Abstract includes, Reference
p.110-122
Subjects/Keywords: Woven fiber; 3D Carbon fiber
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APA (6th Edition):
Shaik, K. V. (2010). Impact testing of advanced ceramic composites using
experimental and F E analysis. (Thesis). Jawaharlal Nehru Technological University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/2680
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shaik, Khadar Vali. “Impact testing of advanced ceramic composites using
experimental and F E analysis.” 2010. Thesis, Jawaharlal Nehru Technological University. Accessed September 20, 2019.
http://shodhganga.inflibnet.ac.in/handle/10603/2680.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shaik, Khadar Vali. “Impact testing of advanced ceramic composites using
experimental and F E analysis.” 2010. Web. 20 Sep 2019.
Vancouver:
Shaik KV. Impact testing of advanced ceramic composites using
experimental and F E analysis. [Internet] [Thesis]. Jawaharlal Nehru Technological University; 2010. [cited 2019 Sep 20].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/2680.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shaik KV. Impact testing of advanced ceramic composites using
experimental and F E analysis. [Thesis]. Jawaharlal Nehru Technological University; 2010. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/2680
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
3.
Hu, Jie-fang.
Fabry-Pérot Fiber Interferometers Based on Polymer Microlenses structure on A Fiber Tip.
Degree: Master, Electro-Optical Engineering, 2014, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705114-161825
► In this dissertation we proposed a Fabry-Pérot fiber interferometer based on a polymer microlens structure on the endface of a single-mode fiber. We can simply…
(more)
▼ In this dissertation we proposed a Fabry-Pérot
fiber interferometer based on a polymer microlens structure on the endface of a single-mode
fiber. We can simply attach a fixed mass of polymer at the
fiber end to form a microlens structure due to the surface tension effect. As the light wave propagates to the interfaces of SMF/polymer and polymer/air, we can obtain two reflective light beams with different optical paths to form the reflective interference spectrum. Besides, as the curvature of radius of the microlens structure increases, the average spacing of the interference fringe becomes larger in the same wavelength range.
We have demonstrated the sensing applications of the microlens-based Fabry-Pérot
fiber interferometers for temperature, surrounding refractive index, and pressure. The temperature sensitivity between 25â to 65â is 634pm/â for the 126.14μm microlens-based
fiber interferometer. As we increase the surrounding refractive index from 1.33 to 1.4071, the 78.82μm microlens-based
fiber interferometer shows a 6.38dB peak intensity difference, and the refractive index sensitivity is -82.26dB/RIU. In addition, the measured pressure sensitivity for the 75μm microlens-based
fiber interferometer is 89pm/psi. We have also compressed the microlens structure by a movable object and found that the average spacing of the interference fringe becomes larger. As a result, our fabricated microlens-based Fabry-Pérot
fiber interferometers can be utilized as useful sensors.
Advisors/Committee Members: Jui-Yang Feng (chair), Hung-wen Chang (chair), Chin-Ping Yu (committee member), Hidenori Taga (chair).
Subjects/Keywords: Fiber Interferometers
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APA (6th Edition):
Hu, J. (2014). Fabry-Pérot Fiber Interferometers Based on Polymer Microlenses structure on A Fiber Tip. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705114-161825
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hu, Jie-fang. “Fabry-Pérot Fiber Interferometers Based on Polymer Microlenses structure on A Fiber Tip.” 2014. Thesis, NSYSU. Accessed September 20, 2019.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705114-161825.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hu, Jie-fang. “Fabry-Pérot Fiber Interferometers Based on Polymer Microlenses structure on A Fiber Tip.” 2014. Web. 20 Sep 2019.
Vancouver:
Hu J. Fabry-Pérot Fiber Interferometers Based on Polymer Microlenses structure on A Fiber Tip. [Internet] [Thesis]. NSYSU; 2014. [cited 2019 Sep 20].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705114-161825.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hu J. Fabry-Pérot Fiber Interferometers Based on Polymer Microlenses structure on A Fiber Tip. [Thesis]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705114-161825
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Wake Forest University
4.
LI, WEI.
Single Fibrin Fiber Mechanical Properties and Lysis.
Degree: 2015, Wake Forest University
URL: http://hdl.handle.net/10339/57266
► Fibrinogen, one of the most abundant proteins in blood plasma, plays a central role in hemostasis and thrombotic disease. In the final step of the…
(more)
▼ Fibrinogen, one of the most abundant proteins in blood plasma, plays a central role in hemostasis and thrombotic disease. In the final step of the coagulation cascade, thrombin proteolytically converts fibrinogen to fibrin, which then forms a mesh of fibrin fibers. This mesh is the major structural component of a blood clot. Over the last few years the mechanical properties of fibrin fibers, such as their modulus, elasticity and extensibility, have been determined using samples formed from purified fibrinogen. In my work, presented in this dissertation, I initiated study on the more complex and more physiologically relevant fibrin fibers formed from plasma samples, in an effort to find relationships between single fibrin fiber mechanical properties and disease states.
Subjects/Keywords: fibrin fiber
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APA (6th Edition):
LI, W. (2015). Single Fibrin Fiber Mechanical Properties and Lysis. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/57266
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
LI, WEI. “Single Fibrin Fiber Mechanical Properties and Lysis.” 2015. Thesis, Wake Forest University. Accessed September 20, 2019.
http://hdl.handle.net/10339/57266.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
LI, WEI. “Single Fibrin Fiber Mechanical Properties and Lysis.” 2015. Web. 20 Sep 2019.
Vancouver:
LI W. Single Fibrin Fiber Mechanical Properties and Lysis. [Internet] [Thesis]. Wake Forest University; 2015. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/10339/57266.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
LI W. Single Fibrin Fiber Mechanical Properties and Lysis. [Thesis]. Wake Forest University; 2015. Available from: http://hdl.handle.net/10339/57266
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Kansas State University
5.
Alrweih, Sulaiman.
Fiber
reinforced concrete.
Degree: MS, Department of Civil
Engineering, 2018, Kansas State University
URL: http://hdl.handle.net/2097/39016
► Engineers involved in construction face various challenges. One of them being dealing with cracks in concrete. Naturally, concrete is weak in tension defining its bristle…
(more)
▼ Engineers involved in construction face various
challenges. One of them being dealing with cracks in concrete.
Naturally, concrete is weak in tension defining its bristle
characteristics. To compensate,
fiber reinforcement is used in the
concrete mixes. Popular
fiber types are steel, glass,
polypropylene, and carbon fibers. These types of fibers are used to
reinforce concrete. These fibers all increase the tensile and
flexural strength of concrete. Additionally, they all have their
own advantages. This paper is oriented to briefly introduce basic
properties of these fibers. This includes the composition,
production, advantages, applications, and restrictions of the
mentioned fibers.
Advisors/Committee Members: Asadollah Esmaeily.
Subjects/Keywords: Steel
fiber; Glass
fiber;
Polypropylene fiber; Carbon
fiber
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APA (6th Edition):
Alrweih, S. (2018). Fiber
reinforced concrete. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/39016
Chicago Manual of Style (16th Edition):
Alrweih, Sulaiman. “Fiber
reinforced concrete.” 2018. Masters Thesis, Kansas State University. Accessed September 20, 2019.
http://hdl.handle.net/2097/39016.
MLA Handbook (7th Edition):
Alrweih, Sulaiman. “Fiber
reinforced concrete.” 2018. Web. 20 Sep 2019.
Vancouver:
Alrweih S. Fiber
reinforced concrete. [Internet] [Masters thesis]. Kansas State University; 2018. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/2097/39016.
Council of Science Editors:
Alrweih S. Fiber
reinforced concrete. [Masters Thesis]. Kansas State University; 2018. Available from: http://hdl.handle.net/2097/39016
University of Johannesburg
6.
Booysen, André.
Veseloptiese koppelaars : vervaardiging en sensortoepassings.
Degree: 2014, University of Johannesburg
URL: http://hdl.handle.net/10210/10079
► M.Ing.
This thesis covers the theory and development of fused, biconically tapered, fibre-optic couplers and their application in sensors. The optical coupling between fibres is…
(more)
▼ M.Ing.
This thesis covers the theory and development of fused, biconically tapered, fibre-optic couplers and their application in sensors. The optical coupling between fibres is described by means of the coupled-mode theory in the case of a weakly guiding coupler. Firstly, simplified expressions for the guided modes in an optical fibre are derived. This is followed by the derivation of the coupled-mode equations for a perturbed waveguide. The coupled-mode equations are then used, together with the expressions for the guided modes, to determine the coupling coefficient for a weakly guiding coupler. In the case where the coupler is not weakly guiding, a model based on a rectangular dielectric waveguide is presented. A process for the manufacture of fibre-optic couplers, based on the fusion and elongation technique, was developed. This process is described and special attention is paid to the influence which different process parameters has on the properties of the couplers. During the development, the coupling theory was utilized to optimize the process. Results obtained with couplers manufactured by this process, are presented. A specific application of couplers, namely a new type of fibre-optic coupler sensor, was developed. The operation of the sensor relies on the change of the coupling ratio with an axially applied mechanical strain. Analog signal processing of the two outputs yields a signal which is directly proportional to the strain and which is independent of fluctuations of the light source power. The sensor was investigated experimentally by manufacturing temperature and elongation sensors which work on this principle. The operation and features of these sensors are presented, together with very promising experimental results.
Subjects/Keywords: Fiber optics
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APA (6th Edition):
Booysen, A. (2014). Veseloptiese koppelaars : vervaardiging en sensortoepassings. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/10079
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Booysen, André. “Veseloptiese koppelaars : vervaardiging en sensortoepassings.” 2014. Thesis, University of Johannesburg. Accessed September 20, 2019.
http://hdl.handle.net/10210/10079.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Booysen, André. “Veseloptiese koppelaars : vervaardiging en sensortoepassings.” 2014. Web. 20 Sep 2019.
Vancouver:
Booysen A. Veseloptiese koppelaars : vervaardiging en sensortoepassings. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/10210/10079.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Booysen A. Veseloptiese koppelaars : vervaardiging en sensortoepassings. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/10079
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universitat Politècnica de València
7.
Zamorano Cantó, Manuel.
INVESTIGACIÓN CON FIBRA RECICLADA DE NEUMÁTICO (F.R.N.) PARA APLICACIONES ACÚSTICAS.
Degree: 2016, Universitat Politècnica de València
URL: http://hdl.handle.net/10251/61972
► [EN] ABSTRACT The behaviour of different types of textile fibres, obtained from extraction and separation methods in the recycling processes of ELT (End of life…
(more)
▼ [EN] ABSTRACT
The behaviour of different types of textile fibres, obtained from extraction and separation methods in the recycling processes of ELT (End of life tyres) (from now on "fluff"), as acoustic absorbent material has been studied in this research work.
This work is a starting point for the study of the use of this type of materials in architectural acoustics applications.
Experimental design was used to study the relevance of the forming conditions: pressure, time and temperature variables. The adjustment of the manufacturing variables: different temperature range, curing time, fluff mass variation, and compaction factor were studied in order to investigate the relation of these parameters to the acoustic intrinsic properties: porosity, tortuosity and air flow permeability. The objective was to achieve the best conditions in the production of panels with the best sound absorbent qualities within the widest frequencies rank.
The production process was carried out by using an octahedral mould, made up of the enclosed body covered by a piston-like lid with downward-upward trajectory. Inside the mould a specific mass of fibres was homogeneously displayed, and then it was placed in a press with heated plates, using the piston to compress the fibres until the established level of pressure. Panels were obtained by applying the precise heating energy in order to reach the required temperature for each particular sample and remaining in these conditions during the fixed time.; [ES] RESUMEN
En este trabajo estudiamos el comportamiento como absorbentes acústicos de diferentes clases de fibras textiles, provenientes de métodos de extracción y separación en el reciclado de neumáticos fuera de uso, en adelante (fluff).
El trabajo es un punto de partida en el estudio de este tipo de materiales para su uso en aplicaciones de acústica arquitectónica.
Mediante diseño de experimentos, se estudia la influencia de las condiciones de conformación: presión, tiempo, temperatura, masa de fluff. Aplicando unas variables en los parámetros de conformado, variación de temperatura, variación de tiempo de exposición, variación de la masa de fluff, y variación del factor de conformación a fin de estudiar la relación de estos parámetros y las propiedades intrínsecas acústicas: porosidad, tortuosidad, permeabilidad al flujo de aire. Consiguiendo las condiciones más optimas, para la posterior conformación de un panel que obtenga las mejores cualidades absorbentes del sonido, en el mayor rango de frecuencias.
El proceso de conformado, se ha llevado a cabo mediante un molde ortoédrico, compuesto por el seno, cubierto por una tapadera tipo pistón descendente en el cual, se han dispuesto homogéneamente una determinada masa de fibras, el molde ha sido situado en una prensa con platos calefactores. Comprimiendo las fibras mediante el descenso del pistón hasta el nivel establecido, aplicándoles energía calorífica, hasta obtener la temperatura indicada en cada muestra, permaneciendo en estas condiciones durante un tiempo determinado.; [CAT]…
Advisors/Committee Members: Crespo Amorós, José Enrique (advisor), Nadal Gisbert, Antonio Vicente (advisor), Segura Alcaraz, Jorge Gabriel (advisor).
Subjects/Keywords: : ¿ground tyre rubber and fiber ¿;
" crum rubber and fiber¿;
¿fiber¿;
¿recycled fiber¿;
¿fluff¿;
¿impedance tube fiber¿;
¿absortion coefficient and fiber¿.
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APA ·
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APA (6th Edition):
Zamorano Cantó, M. (2016). INVESTIGACIÓN CON FIBRA RECICLADA DE NEUMÁTICO (F.R.N.) PARA APLICACIONES ACÚSTICAS.
(Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/61972
Chicago Manual of Style (16th Edition):
Zamorano Cantó, Manuel. “INVESTIGACIÓN CON FIBRA RECICLADA DE NEUMÁTICO (F.R.N.) PARA APLICACIONES ACÚSTICAS.
” 2016. Doctoral Dissertation, Universitat Politècnica de València. Accessed September 20, 2019.
http://hdl.handle.net/10251/61972.
MLA Handbook (7th Edition):
Zamorano Cantó, Manuel. “INVESTIGACIÓN CON FIBRA RECICLADA DE NEUMÁTICO (F.R.N.) PARA APLICACIONES ACÚSTICAS.
” 2016. Web. 20 Sep 2019.
Vancouver:
Zamorano Cantó M. INVESTIGACIÓN CON FIBRA RECICLADA DE NEUMÁTICO (F.R.N.) PARA APLICACIONES ACÚSTICAS.
[Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2016. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/10251/61972.
Council of Science Editors:
Zamorano Cantó M. INVESTIGACIÓN CON FIBRA RECICLADA DE NEUMÁTICO (F.R.N.) PARA APLICACIONES ACÚSTICAS.
[Doctoral Dissertation]. Universitat Politècnica de València; 2016. Available from: http://hdl.handle.net/10251/61972
Cornell University
8.
Cheng, Ji.
Experimental Studies On Single-Mode And Intermodal Nonlinear Optics In Higher-Order-Mode Fiber
.
Degree: 2012, Cornell University
URL: http://hdl.handle.net/1813/31433
► The higher-order-mode (HOM) fiber has recently received great attention due to its special optical properties. The most significant one is its capability of propagating different…
(more)
▼ The higher-order-mode (HOM)
fiber has recently received great attention due to its special optical properties. The most significant one is its capability of propagating different modes, which is now being utilized to increase data transmission capacity in telecommunication through mode-division multiplexing. Furthermore, the LP02 mode of the
fiber can be designed to provide dispersion characteristics dramatically different from conventional step-index single-mode fibers (SMFs), such as anomalous dispersion below 1300 nm. This feature has also been widely utilized in a number of applications, including dispersion compensation, high energy pulsedelivery, and nonlinear wavelength conversion. In all the existing applications of the HOM fibers, however, coupling between different guided modes is not desirable, and thus avoided. In order to minimize mode coupling induced by waveguide perturbation, HOM fibers are designed such that the modes have very different effective refractive indices (neff) at the wavelengths of operation. Consequently, optical effects involve multiple modes, especially multimode nonlinear effects, in the HOM
fiber have rarely been explored. This work focuses on the nonlinear wavelength conversion effects in HOM fibers, including soliton self-frequency shift (SSFS), Cerenkov radiation, and four- wave mixing (FWM), in both single-mode and multimode schemes. We experimentally demonstrate four nonlinear effects with HOM fibers: 1) SSFS below 800 nm and efficient Cerenkov radiation in the vicinity of 850 nm; 2) high-energy soliton generation at 1080 nm; 3) Intermodal FWM in an all-
fiber laser system; 4) Intermodal Cerenkov radiation. In addition, we have developed a convenient dispersion measurement technique specifically tailored for HOM
fiber. The results of these experimental demonstrations may lead to potential applications in both biomedical imaging and telecommunication.
Advisors/Committee Members: Zipfel, Warren R. (committeeMember), Lipson, Michal (committeeMember).
Subjects/Keywords: Nonlinear Fiber Optics;
Higher-order-mode Fiber
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APA (6th Edition):
Cheng, J. (2012). Experimental Studies On Single-Mode And Intermodal Nonlinear Optics In Higher-Order-Mode Fiber
. (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/31433
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cheng, Ji. “Experimental Studies On Single-Mode And Intermodal Nonlinear Optics In Higher-Order-Mode Fiber
.” 2012. Thesis, Cornell University. Accessed September 20, 2019.
http://hdl.handle.net/1813/31433.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cheng, Ji. “Experimental Studies On Single-Mode And Intermodal Nonlinear Optics In Higher-Order-Mode Fiber
.” 2012. Web. 20 Sep 2019.
Vancouver:
Cheng J. Experimental Studies On Single-Mode And Intermodal Nonlinear Optics In Higher-Order-Mode Fiber
. [Internet] [Thesis]. Cornell University; 2012. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/1813/31433.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cheng J. Experimental Studies On Single-Mode And Intermodal Nonlinear Optics In Higher-Order-Mode Fiber
. [Thesis]. Cornell University; 2012. Available from: http://hdl.handle.net/1813/31433
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Mississippi State University
9.
Scott, Dylan Andrew.
Introducing new energy dissipation mechanisms for steel fiber reinforcement in ultra-high performance concrete.
Degree: MS, Mechanical Engineering, 2017, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-10262017-160054/
;
► By adding annealed plain carbon steel fibers and stainless steel fibers into Ultra-High Performance Concrete (UHPC), we have increased UHPCs toughness through optimized thermal processing…
(more)
▼ By adding annealed plain carbon steel fibers and stainless steel fibers into Ultra-High Performance Concrete (UHPC), we have increased UHPCs toughness through optimized thermal processing and alloy selection of steel
fiber reinforcements. Currently, steel
fiber reinforcements used in UHPCs are extremely brittle and have limited energy dissipation mainly through debonding due to matrix crumbling with some pullout. Implementing optimized heat treatments and selecting proper alternative alloys can drastically improve the post-yield carrying capacity of UHPCs for static and dynamic applications through plastic deformations, phase transformations, and
fiber pullout. By using a phase transformable stainless steel, the ultimate flexural strength increased from 32.0 MPa to 42.5 MPa (33%) and decreased the post-impact or residual projectile velocity measurements an average of 31.5 m/s for 2.54 cm and 5.08 cm thick dynamic impact panels.
Advisors/Committee Members: Dr. Mark F. Horstemeyer (chair), Dr. Robert D. Moser (committee member), Dr. Isaac Howard (committee member), Dr. Youssef Hammi (committee member).
Subjects/Keywords: UHPC; steel fiber reinforcement; fiber reinforced concrete
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APA (6th Edition):
Scott, D. A. (2017). Introducing new energy dissipation mechanisms for steel fiber reinforcement in ultra-high performance concrete. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-10262017-160054/ ;
Chicago Manual of Style (16th Edition):
Scott, Dylan Andrew. “Introducing new energy dissipation mechanisms for steel fiber reinforcement in ultra-high performance concrete.” 2017. Masters Thesis, Mississippi State University. Accessed September 20, 2019.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-10262017-160054/ ;.
MLA Handbook (7th Edition):
Scott, Dylan Andrew. “Introducing new energy dissipation mechanisms for steel fiber reinforcement in ultra-high performance concrete.” 2017. Web. 20 Sep 2019.
Vancouver:
Scott DA. Introducing new energy dissipation mechanisms for steel fiber reinforcement in ultra-high performance concrete. [Internet] [Masters thesis]. Mississippi State University; 2017. [cited 2019 Sep 20].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-10262017-160054/ ;.
Council of Science Editors:
Scott DA. Introducing new energy dissipation mechanisms for steel fiber reinforcement in ultra-high performance concrete. [Masters Thesis]. Mississippi State University; 2017. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-10262017-160054/ ;
Mississippi State University
10.
Herath, Chamini Saumya.
FIBER LOOP RINGDOWN EVANESCENT FIELD SENSORS.
Degree: MS, Physics and Astronomy, 2010, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102010-175145/
;
► We combine the evanescent field (EF) sensing mechanism with the fiber loop ringdown (FLRD) sensing scheme to create FLRD-EF sensors. The EF sensor heads…
(more)
▼ We combine the evanescent field (EF) sensing mechanism with the
fiber loop
ringdown (FLRD) sensing scheme to create FLRD-EF sensors. The EF sensor heads are
fabricated by etching the cladding of a single-mode
fiber (SMF), while monitoring the
etching process by the FLRD technique in real-time, on-line with high control precision.
The effect of the sensor head dimensions on the sensors' detection sensitivity and
response time are investigated. The EF scattering (EFS) sensing mechanism is combined
with the FLRD detection scheme to create a new type of
fiber optic index sensor. The
detection limit for an optical index change is 3.2×10
-5. This is the highest sensitivity for a
fiber optic index sensor so far, without using any chemical-coating or optical components
at the sensor head. A new type of index-based biosensor using high sensitivity FLRDEFS
technique to sense deoxyribonucleic acid (DNA) and bacteria (<i>Escherichia coli</i>) is
created.
Advisors/Committee Members: Chuji Wang (chair), David L. Monts (committee member), Henk F. Arnoldus (committee member).
Subjects/Keywords: Fiber Optic Sensors; Fiber Loop Ringdown
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APA (6th Edition):
Herath, C. S. (2010). FIBER LOOP RINGDOWN EVANESCENT FIELD SENSORS. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102010-175145/ ;
Chicago Manual of Style (16th Edition):
Herath, Chamini Saumya. “FIBER LOOP RINGDOWN EVANESCENT FIELD SENSORS.” 2010. Masters Thesis, Mississippi State University. Accessed September 20, 2019.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102010-175145/ ;.
MLA Handbook (7th Edition):
Herath, Chamini Saumya. “FIBER LOOP RINGDOWN EVANESCENT FIELD SENSORS.” 2010. Web. 20 Sep 2019.
Vancouver:
Herath CS. FIBER LOOP RINGDOWN EVANESCENT FIELD SENSORS. [Internet] [Masters thesis]. Mississippi State University; 2010. [cited 2019 Sep 20].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102010-175145/ ;.
Council of Science Editors:
Herath CS. FIBER LOOP RINGDOWN EVANESCENT FIELD SENSORS. [Masters Thesis]. Mississippi State University; 2010. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-11102010-175145/ ;
Vanderbilt University
11.
Xu, Qing.
Towards population based characterization of neuronal fiber pathways with diffusion tensor imaging.
Degree: PhD, Electrical Engineering, 2010, Vanderbilt University
URL: http://etd.library.vanderbilt.edu/available/etd-07272010-004440/
;
► Diffusion tensor imaging has been widely used to reconstruct neuronal fibers in the human brain. Studying these fibers often requires them to be grouped into…
(more)
▼ Diffusion tensor imaging has been widely used to reconstruct neuronal fibers in the human brain. Studying these fibers often requires them to be grouped into bundles that correspond to coherent anatomic structures. Several
fiber bundling methods are proposed and evaluated in this work. A unified
fiber bundling and registration algorithm, which refers to a pre-built bundle template, is firstly proposed to provide
fiber bundling consistent with well-defined major white matter pathways. Furthermore, a clustering algorithm, which is constrained by a cortex parcellation, is proposed to automatically segment connections between cortical/sub-cortical areas. Based on this framework, a group-wise
fiber bundling method is further proposed to leverage a group of DTI data for improving across
subject bundle consistency. The above methods have been rigorously evaluated with in vivo DTI data, demonstrating a potential of being used to better characterize white matter pathways and measure the connectivity.
Advisors/Committee Members: Zhaohua Ding (chair), Adam W. Anderson (committee member), Benoit Dawant (committee member), Mark D. Does (committee member), D. Mitchell Wilkes (committee member).
Subjects/Keywords: fiber bundling; diffusion tensor imaging; fiber registration
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Xu, Q. (2010). Towards population based characterization of neuronal fiber pathways with diffusion tensor imaging. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://etd.library.vanderbilt.edu/available/etd-07272010-004440/ ;
Chicago Manual of Style (16th Edition):
Xu, Qing. “Towards population based characterization of neuronal fiber pathways with diffusion tensor imaging.” 2010. Doctoral Dissertation, Vanderbilt University. Accessed September 20, 2019.
http://etd.library.vanderbilt.edu/available/etd-07272010-004440/ ;.
MLA Handbook (7th Edition):
Xu, Qing. “Towards population based characterization of neuronal fiber pathways with diffusion tensor imaging.” 2010. Web. 20 Sep 2019.
Vancouver:
Xu Q. Towards population based characterization of neuronal fiber pathways with diffusion tensor imaging. [Internet] [Doctoral dissertation]. Vanderbilt University; 2010. [cited 2019 Sep 20].
Available from: http://etd.library.vanderbilt.edu/available/etd-07272010-004440/ ;.
Council of Science Editors:
Xu Q. Towards population based characterization of neuronal fiber pathways with diffusion tensor imaging. [Doctoral Dissertation]. Vanderbilt University; 2010. Available from: http://etd.library.vanderbilt.edu/available/etd-07272010-004440/ ;
University of Toronto
12.
Zhang, Yiwei.
Interferometric Distributed Fiber Optic Sensing.
Degree: 2014, University of Toronto
URL: http://hdl.handle.net/1807/67973
► This thesis studies single-arm frequency-shifted interferometry (SA-FSI), a simple, compact, practical and versatile fiber optic sensing technique which has many advantages over conventional techniques. We…
(more)
▼ This thesis studies single-arm frequency-shifted interferometry (SA-FSI), a simple, compact, practical and versatile fiber optic sensing technique which has many advantages over conventional techniques. We further developed the theory of SA-FSI, and successfully demonstrate that SA-FSI can achieve long distance and high sensitivity sensing multiplexing.In this thesis work, we also build a model of the working principle of a distributed vibration sensing system developed by QPS Photronics Inc., and explore its sensing features. Three different types of reflective terminations (a QPS VibroFibre sensor, a flat end fiber, and a loop mirror) have been used in our experiments. Experimental results for these three reflective terminations are consistent with simulation results based on our model.
M.A.S.
Advisors/Committee Members: Qian, Li, Electrical and Computer Engineering.
Subjects/Keywords: Fiber optics; Fiber optic sensing; Multiplexing; 0544
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APA (6th Edition):
Zhang, Y. (2014). Interferometric Distributed Fiber Optic Sensing. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/67973
Chicago Manual of Style (16th Edition):
Zhang, Yiwei. “Interferometric Distributed Fiber Optic Sensing.” 2014. Masters Thesis, University of Toronto. Accessed September 20, 2019.
http://hdl.handle.net/1807/67973.
MLA Handbook (7th Edition):
Zhang, Yiwei. “Interferometric Distributed Fiber Optic Sensing.” 2014. Web. 20 Sep 2019.
Vancouver:
Zhang Y. Interferometric Distributed Fiber Optic Sensing. [Internet] [Masters thesis]. University of Toronto; 2014. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/1807/67973.
Council of Science Editors:
Zhang Y. Interferometric Distributed Fiber Optic Sensing. [Masters Thesis]. University of Toronto; 2014. Available from: http://hdl.handle.net/1807/67973
University of Arizona
13.
Song, Jiawei.
Nd-doped Fiber Lasers and Fiber Amplifiers at 9xx nm
.
Degree: 2016, University of Arizona
URL: http://hdl.handle.net/10150/620827
► The lasers operating in the wavelength range of 900 - 1000 nm have caused intense attention because they are in great demands for: 1. Highpower…
(more)
▼ The lasers operating in the wavelength range of 900 - 1000 nm have caused intense attention because they are in great demands for: 1. Highpower blue and deep UV laser generation 2. High power single-mode pump laser source 3. Light detection and Lidar , etc. And now, there are actually many different types of lasers can generate laser in this wavelength range. For example, Nd and Yb doped
fiber laser, Nd and Yb doped glass and crystal lasers, OPO and SHG laser, etc. Among all this options, we decided to study the Nd-doped
fiber laser for their outstanding advantages: 1. As
fiber laser, it possess all the advantages of any
fiber lasers have, such as: high power scalability, excellent beam quality, high spectral and intensity stability, super compactness, robustness and reliability. 2. Comparing to other rare-earth-ion, the Nd
3+ ions have a more broad emission wavelength range from 900-950 nm. My goals for doing this thesis research are:1.Experimentally and theoretically investigate Nd-doped
fiber lasers and amplifiers at 9xx nm. 2. Develop 9xx nm single frequency
fiber lasers and amplifiers. 3.Obtain directions for developing high power single-frequency Nd-doped
fiber laser sources at 9xx nm. To achieve these goals, 1. Nd-doped
fiber lasers at 934 nm were investigated. 2. Core-pumped and cladding-pumped Nd-doped
fiber amplifiers are also investigated. 3. The simulation of the Nd-doped
fiber amplifiers have been done.
Advisors/Committee Members: Zhu, Xiushan (advisor), Peyghambarian, Nasser (advisor), Liang, Rongguang (committeemember).
Subjects/Keywords: Fiber Laser;
Optical Sciences;
Fiber Amplifier
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APA ·
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Manager
APA (6th Edition):
Song, J. (2016). Nd-doped Fiber Lasers and Fiber Amplifiers at 9xx nm
. (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/620827
Chicago Manual of Style (16th Edition):
Song, Jiawei. “Nd-doped Fiber Lasers and Fiber Amplifiers at 9xx nm
.” 2016. Masters Thesis, University of Arizona. Accessed September 20, 2019.
http://hdl.handle.net/10150/620827.
MLA Handbook (7th Edition):
Song, Jiawei. “Nd-doped Fiber Lasers and Fiber Amplifiers at 9xx nm
.” 2016. Web. 20 Sep 2019.
Vancouver:
Song J. Nd-doped Fiber Lasers and Fiber Amplifiers at 9xx nm
. [Internet] [Masters thesis]. University of Arizona; 2016. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/10150/620827.
Council of Science Editors:
Song J. Nd-doped Fiber Lasers and Fiber Amplifiers at 9xx nm
. [Masters Thesis]. University of Arizona; 2016. Available from: http://hdl.handle.net/10150/620827
University of Johannesburg
14.
Kritzinger, Ronnie.
Manufacturing of azimuthally symmetric long-period fibre gratings using a CO2 laser.
Degree: 2012, University of Johannesburg
URL: http://hdl.handle.net/10210/6675
► M.Ing.
The development of fibre optic technology as we know it today, has taken a giant leap forward since the introduction of Internet technology and…
(more)
▼ M.Ing.
The development of fibre optic technology as we know it today, has taken a giant leap forward since the introduction of Internet technology and other telecommunication devices. More recently, the need exists to retrieve and send huge amounts of data fast and efficiently by using fibre optic cable in computer networks, without the need of expensive equipment. Due to the large amounts of data (like video and audio) that has to be sent and received across a computer network at large distances, this dissertation is primarily concerned with the design and manufacturing of low-loss uniform long period fibre gratings for the realization of future optical add/drop multiplexers. An azimuthally symmetric manufacturing method is implemented using several optical components and devices. Several electronic devices are connected to a Mannesmann Rexroth ECODRIVE03 drive controller unit, and a computer control program was written in VISUAL BASIC 6.0 to control these devices during the manufacturing of these unique LPGs. A number of theories and numerical methods such as the coupled-mode theory and the transfer matrix method are applied in the analysis, modelling, and simulation of short/long-period fibre gratings. Simulation results were obtained in MATLAB 6.5 and the code was written in such a way that the end user could simulate any short/long-period grating and obtain the necessary results such as the transmission spectra, time delay and dispersion for uniform fibre gratings. These simulations obtained were a good indication on how the experimental results should look after manufacturing the unique symmetric LPGs.
Subjects/Keywords: Optical communications; Optical fiber detectors; Fiber optics
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APA (6th Edition):
Kritzinger, R. (2012). Manufacturing of azimuthally symmetric long-period fibre gratings using a CO2 laser. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/6675
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kritzinger, Ronnie. “Manufacturing of azimuthally symmetric long-period fibre gratings using a CO2 laser.” 2012. Thesis, University of Johannesburg. Accessed September 20, 2019.
http://hdl.handle.net/10210/6675.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kritzinger, Ronnie. “Manufacturing of azimuthally symmetric long-period fibre gratings using a CO2 laser.” 2012. Web. 20 Sep 2019.
Vancouver:
Kritzinger R. Manufacturing of azimuthally symmetric long-period fibre gratings using a CO2 laser. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/10210/6675.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kritzinger R. Manufacturing of azimuthally symmetric long-period fibre gratings using a CO2 laser. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/6675
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Johannesburg
15.
Chtcherbakov, Anatoli Aleksandrovich.
Reflective interferometric fibre optic sensors.
Degree: 2012, University of Johannesburg
URL: http://hdl.handle.net/10210/5707
► D.Ing.
This work comprises a study of reflective interferometric fibre optic sensors. The use of Bragg gratings, multilayer quarter-wave stacks, and rugate mirrors for fibre…
(more)
▼ D.Ing.
This work comprises a study of reflective interferometric fibre optic sensors. The use of Bragg gratings, multilayer quarter-wave stacks, and rugate mirrors for fibre optic sensing applications is discussed in this work. Rugate mirrors are presented in more detail since they form an important part of the research. The control system for an electron cyclotron resonance plasma enhanced chemical vapour deposition reactor was developed for the growth of inhomogeneous dielectric filters. The system is intended to control the growth of films of the required refractive index profile for optical applications on different substrates including fibre ends. The system also includes an automatic microwave tuner. Rugate mirrors deposited directly on optical fibre were used in a dual cavity Fabry- Perot interferometric strain sensor. It was found by computer simulation that reflectances of 40% for the two outer mirrors and 68% for the centre mirror allow the interferometer to have maximum fringe amplitude. The sensor was evaluated experimentally as a strain gauge. The maximum strain applied to the sample was about 0.12% and the corresponding phase change was about 800 radians. The discrepancy between the readings of this sensor and those of a resistive strain gauge, applied to the same structure, did not exceed 5%. Two novel fibre optic sensors were developed during this work: a merged Sagnac- Michelson interferometric sensor for distributed disturbance detection, and a disturbance location sensor using modified Sagnac and Mach-Zehnder interferometers. Both are intended for distributed impact location along the fibre. The magnitude of impact can also be measured with these sensors. The merged Sagnac-Michelson interferometric sensor uses two light sources and a frequency selective mirror to separate the Michelson and Sagnac signals. Birefringence in the fibre was used to bias the Sagnac interferometer to have a sine response. Computer simulations yielded the optimal biasing conditions: the state of linear polarisation of the input light should be rotated by r/4 with respect to the horizontal axis; birefringence in the Sagnac loop must provide retardation of ff/2 with the optical axes rotated by K/4 with respect to the horizontal axis. We verified the sensor concept experimentally. The discrepancy between measured and actual locations of disturbances applied to the fibre did not exceed 2.5 m for a 200 m long sensing loop. The sensor using the modified Sagnac and Mach-Zehnder interferometers makes use of phase modulation and synchronous detection to obtain the sine-biased Sagnac signal. A modified Sagnac interferometer configuration that incorporates an additional coupler and a mirror, allows separation of the Sagnac and Mach-Zehnder signals. Operation of the new configuration was verified experimentally in the system with a sensing fibre of 100 m long. The discrepancy between measured and actual locations of disturbances applied to the fibre did not exceed 2 m.
Subjects/Keywords: Fiber optics.; Interferometers.; Optical fiber detectors.
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Manager
APA (6th Edition):
Chtcherbakov, A. A. (2012). Reflective interferometric fibre optic sensors. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/5707
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chtcherbakov, Anatoli Aleksandrovich. “Reflective interferometric fibre optic sensors.” 2012. Thesis, University of Johannesburg. Accessed September 20, 2019.
http://hdl.handle.net/10210/5707.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chtcherbakov, Anatoli Aleksandrovich. “Reflective interferometric fibre optic sensors.” 2012. Web. 20 Sep 2019.
Vancouver:
Chtcherbakov AA. Reflective interferometric fibre optic sensors. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/10210/5707.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chtcherbakov AA. Reflective interferometric fibre optic sensors. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/5707
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Southern California
16.
Tsai, Yun-I.
Environmental effects on the hybrid glass fiber/carbon fiber
composites.
Degree: PhD, Materials Science & Engineering, 2009, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/267285/rec/2398
► Fiber reinforced polymer composites (FRPCs) have been widely used to replace conventional metals due to the high specific strength, fatigue resistance, and light weight. In…
(more)
▼ Fiber reinforced polymer composites (FRPCs) have been
widely used to replace conventional metals due to the high specific
strength, fatigue resistance, and light weight. In the power
distribution industry, an advanced composites rod has been
developed to replace conventional steel cable as the load-bearing
core of overhead conductors. Such conductors, called aluminum
conductor composite core (ACCC) significantly increases the
transmitting efficiency of existing power grid system without
extensive rebuilding expenses, while meeting future demand for
electricity. In general, the service life of such overhead
conductors is required to be at least 30 years. Therefore, the
long-term endurance of the composite core in various environments
must be well-understood.; Accelerated aging by hygrothermal
exposure was conducted to determine the effect of moisture on the
glass
fiber (GF)/carbon
fiber (CF) hybrid composites. The influence
of water immersion and humid air exposure on mechanical properties
is investigated. Results indicated that immersion in water is the
most severe environment for such hybrid GF/CF composites, and
results in greater saturation and degradation of properties. When
immersed directly in water, the hybrid GF/CF composites exhibit a
moisture uptake behavior that is more complex than composite
materials reinforced with only one type of
fiber. The unusual
diffusion behavior is attributed to a higher packing density of
fibers at the annular GF/CF interface, which acts as a temporary
moisture barrier. Moisture uptake leads to the mechanical and
thermal degradation of such hybrid GF/CF composites. Findings
presented here indicate that the degradation is a function of
exposure temperature, time, and moisture uptake level. Results also
indicate that such hybrid GF/CF composites recover short beam shear
(SBS) strength and glass transition temperature (Tg) values
comparable to pre-aged samples after removal of the absorbed
moisture.; In the hygrothermal environment (60°C/85% R.H. air), the
hybrid GF/CF composites exhibit theoretical Fickian behavior before
reaching the pseudo-saturation level. However, with continued
exposure, the composites then exhibit weight loss, a phenomenon
attributed to a combination of a dehydration reaction and a
hydrolysis reaction. These reactions resulted in loss of low
molecular weight molecules present in the epoxy matrix. Results
indicate that a small amount of moisture-induced damage occurred in
the hybrid composites, although the mechanical and thermal
properties were only slightly diminished. In fact, the retained
tensile strength was equivalent to the rated tensile strength.; The
influence of thermal exposure on the strength of hybrid GF/CF
composites was thoroughly investigated. Results indicate that
tensile strength and modulus degrade as a function of temperature
and time. When the aging temperature is close to Tg, degradation
was increased along with increasing temperature. Results also
indicate that storage modulus can be used as an index to predict
the temperature…
Advisors/Committee Members: Nutt, Steven R. (Committee Chair), Goo, Edward K. (Committee Member), Sammis, Charles G. (Committee Member).
Subjects/Keywords: carbon fiber; glass fiber; composites; hygrothermal; thermal
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tsai, Y. (2009). Environmental effects on the hybrid glass fiber/carbon fiber
composites. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/267285/rec/2398
Chicago Manual of Style (16th Edition):
Tsai, Yun-I. “Environmental effects on the hybrid glass fiber/carbon fiber
composites.” 2009. Doctoral Dissertation, University of Southern California. Accessed September 20, 2019.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/267285/rec/2398.
MLA Handbook (7th Edition):
Tsai, Yun-I. “Environmental effects on the hybrid glass fiber/carbon fiber
composites.” 2009. Web. 20 Sep 2019.
Vancouver:
Tsai Y. Environmental effects on the hybrid glass fiber/carbon fiber
composites. [Internet] [Doctoral dissertation]. University of Southern California; 2009. [cited 2019 Sep 20].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/267285/rec/2398.
Council of Science Editors:
Tsai Y. Environmental effects on the hybrid glass fiber/carbon fiber
composites. [Doctoral Dissertation]. University of Southern California; 2009. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/267285/rec/2398
University of Texas – Austin
17.
Appaiah, Kumar.
Signal processing and incoherent-MIMO for multimode optical fibers.
Degree: PhD, Electrical and Computer Engineering, 2013, University of Texas – Austin
URL: http://hdl.handle.net/2152/25113
► Multimode fibers (MMF) are generally used in short and medium haul optical networks owing to the availability of low cost devices and inexpensive packaging solutions.…
(more)
▼ Multimode fibers (MMF) are generally used in short and medium haul optical networks owing to the availability of low cost devices and inexpensive packaging solutions. However, the performance of conventional multimode fibers is limited primarily by the presence of high modal dispersion owing to large core diameters. While electronic dispersion compensation methods improve the bandwidth-distance product of MMFs, they do not utilize the fundamental diversity present in the different modes of the multimode
fiber. This thesis draws from developments in wireless communication theory and signal processing to motivate the use of multiple-input multiple-output (MIMO) and signal processing techniques in MMF links. MIMO techniques that utilize the diversity of modes present in the
fiber increase data rates and link reliability. Theoretical models for propagation effects in MMF systems are used to analyze and design the geometry of laser and detector arrays for MIMO-MMF links, and study how the design of these arrays impacts link performance. These models are also used to develop and evaluate low-complexity algorithms that efficiently utilize dense detector arrays, with "greedy subset selection" based on submodular optimization. Experimental evaluation of 1 × 1, 2 × 2, 3 × 3 and 4 × 4 MIMO systems have been conducted over various MMF media, including 100 m - 3 km silica MMF with externally modulated distributed feedback lasers and directly modulated vertical cavity surface emitting lasers (VCSELs), as well as with Fabry Perot lasers over 10 m - 100 m plastic MMF. The use of off-the-shelf components as well as the role of axial offset coupling in enhancing modal diversity has been experimentally quantified. The experimental techniques discussed in this thesis have enabled an increase of over 25× in the bandwidth-distance product of the MMF link, when compared to currently deployed MMF systems, such as 10GBASE-SR.
Advisors/Committee Members: Vishwanath, Sriram (advisor), Bank, Seth Robert (advisor).
Subjects/Keywords: Fiber optics; Multimode fiber; Modulation; Communication; Multiplexing
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APA (6th Edition):
Appaiah, K. (2013). Signal processing and incoherent-MIMO for multimode optical fibers. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/25113
Chicago Manual of Style (16th Edition):
Appaiah, Kumar. “Signal processing and incoherent-MIMO for multimode optical fibers.” 2013. Doctoral Dissertation, University of Texas – Austin. Accessed September 20, 2019.
http://hdl.handle.net/2152/25113.
MLA Handbook (7th Edition):
Appaiah, Kumar. “Signal processing and incoherent-MIMO for multimode optical fibers.” 2013. Web. 20 Sep 2019.
Vancouver:
Appaiah K. Signal processing and incoherent-MIMO for multimode optical fibers. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2013. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/2152/25113.
Council of Science Editors:
Appaiah K. Signal processing and incoherent-MIMO for multimode optical fibers. [Doctoral Dissertation]. University of Texas – Austin; 2013. Available from: http://hdl.handle.net/2152/25113
University of Georgia
18.
Jordan, Carly Nicole.
Striated biber assemblins in the Apicomplexa.
Degree: PhD, Cellular Biology, 2011, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/jordan_carly_n_201105_phd
► The phylum Apicomplexa is a diverse group of intracellular parasites of humans and animals. The invasive stage, the zoite, is found in each species at…
(more)
▼ The phylum Apicomplexa is a diverse group of intracellular parasites of humans and animals. The invasive stage, the zoite, is found in each species at some point in their life cycle. The zoite is an organized and polar cell with specialized cytoskeletal elements and organelles at the apical end that aid in host cell invasion. Cell division or generation of the zoite occurs using several unconventional mechanisms. Endodyogeny is a form of internal budding, whereby two daughter cells are constructed within the mother following a single round of DNA replication and nuclear division. More complicated forms of Apicomplexan cell division include endopolygeny and schizogony, where dozens of daughters are built within a single mother cell, after multiple rounds of DNA replication with or without consecutive nuclear division. How cells ensure that each daughter receives one copy of the genome and each organelle is a key question that is the focus of this dissertation.
Previous work demonstrated that the centrosomes, from which spindle microtubules originate, associate with organelles during division, and that a striated
fiber has been observed near the centrosomes in ultrastructural studies of dividing Apicomplexa. We hypothesize that daughter cells construction is organized by the centrosomes via a physical structure composed of striated
fiber assemblin (SFA) proteins.
SFA genes are encoded in the genomes of many Apicomplexa. We visualized these proteins in T. gondii tachyzoites expressing epitope tags for immunofluorescence assays (IFA), and observed that SFA proteins have a dynamic localization pattern over the cell cycle. SFA first appears as discrete spots on or near duplicated centrosomes. As daughters are built, SFA forms
a curved
fiber between the centrosome and the apical end of developing daughter cells. Overexpression of the SFAs results in major division defects as well as mislocalization of other proteins involved in daughter cell formation. Antibodies created against recombinant T. gondii SFAs were used for IFA on the related parasite Sarcocystis neurona, and label structures near the spindle and apical end of developing zoites. Taken together, these results suggest that the SFA fibers play an important and conserved role in daughter cell formation in the Apicomplexa.
Advisors/Committee Members: Boris Striepen.
Subjects/Keywords: Striated Fiber Assemblin
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APA (6th Edition):
Jordan, C. N. (2011). Striated biber assemblins in the Apicomplexa. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/jordan_carly_n_201105_phd
Chicago Manual of Style (16th Edition):
Jordan, Carly Nicole. “Striated biber assemblins in the Apicomplexa.” 2011. Doctoral Dissertation, University of Georgia. Accessed September 20, 2019.
http://purl.galileo.usg.edu/uga_etd/jordan_carly_n_201105_phd.
MLA Handbook (7th Edition):
Jordan, Carly Nicole. “Striated biber assemblins in the Apicomplexa.” 2011. Web. 20 Sep 2019.
Vancouver:
Jordan CN. Striated biber assemblins in the Apicomplexa. [Internet] [Doctoral dissertation]. University of Georgia; 2011. [cited 2019 Sep 20].
Available from: http://purl.galileo.usg.edu/uga_etd/jordan_carly_n_201105_phd.
Council of Science Editors:
Jordan CN. Striated biber assemblins in the Apicomplexa. [Doctoral Dissertation]. University of Georgia; 2011. Available from: http://purl.galileo.usg.edu/uga_etd/jordan_carly_n_201105_phd
Texas A&M University
19.
Ng, Eng Hwa.
Genetics of Cotton Fiber Elongation.
Degree: 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/151034
► Fiber elongation (ability to stretch before breaking) is one of the key components in determining overall yarn quality. Elongation in U.S. upland cotton (G. hirsutum…
(more)
▼ Fiber elongation (ability to stretch before breaking) is one of the key components in determining overall yarn quality. Elongation in U.S. upland cotton (G. hirsutum L.) has remained largely neglected due to: absence of monetary incentives for growers to produce high elongation cotton; lack of research interests among breeders; and absence of a reliable
fiber testing system for elongation. This study was conducted to determine the genetics of cotton
fiber elongation via a diallel and generation means analysis (GMA). Findings from this study should lay the foundation for future breeding work in cotton
fiber elongation.
Of the seven distinctive upland parents used for the diallel study, general combining ability was far more prominent than specific combing ability for
fiber elongation. Cultivar PSC 355 and Dever experimental line were the two parents identified as good combiners for
fiber elongation in this study. The slight negative correlation between
fiber elongation and strength remained true. Highly significant negative correlation was observed between
fiber upper half mean length and elongation. Both Stelometer and HVI elongation measurements correlated well with values of 0.85 and 0.82 in 2010 and 2011, respectively. For the six families used in the GMA analysis, additive genetic control was prevalent over dominance effect. Based on the scaling test, no significant epistatic interaction was detected for
fiber elongation. As expected, additive variance constituted a much larger portion of total genetic variation in
fiber elongation than the dominance variance. On average, larger numbers of effective factor were identified in
fiber elongation than all other
fiber traits tested, suggesting that parents used in the GMA study are carrying different genetic materials/ loci for
fiber elongation. Considerable gains in
fiber elongation may be achieved by selectively crossing these materials in a pure-line breeding scheme while holding other important
fiber traits constant.
Advisors/Committee Members: Smith, C. Wayne (advisor), Raj, Yog (committee member), Cothren, J. Tom (committee member), Hague, Steve (committee member), Hequet, Eric (committee member).
Subjects/Keywords: Cotton; Fiber elongation
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APA (6th Edition):
Ng, E. H. (2013). Genetics of Cotton Fiber Elongation. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151034
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ng, Eng Hwa. “Genetics of Cotton Fiber Elongation.” 2013. Thesis, Texas A&M University. Accessed September 20, 2019.
http://hdl.handle.net/1969.1/151034.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ng, Eng Hwa. “Genetics of Cotton Fiber Elongation.” 2013. Web. 20 Sep 2019.
Vancouver:
Ng EH. Genetics of Cotton Fiber Elongation. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/1969.1/151034.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ng EH. Genetics of Cotton Fiber Elongation. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151034
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
20.
Liu, Yun Hua.
Molecular Basis of Quantitative Genetics Revealed by Cloning and Analysis of 474 Genes Controlling Fiber Length in Cotton.
Degree: 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/153405
► Cotton (Gossypium spp.) is a leading textile crop in the world, generating an annual economic benefit of over hundred billion USD. However, few genes controlling…
(more)
▼ Cotton (Gossypium spp.) is a leading textile crop in the world, generating an annual economic benefit of over hundred billion USD. However, few genes controlling
fiber quality and yield traits have been cloned and characterized to date. In this study, a large number of genes controlling the upper half mean length (UHML) of fibers were cloned using a newly-developed high-throughput gene and QTL cloning system and subjected to systems analysis. Furthermore, the molecular basis and regulation mechanisms of UHML were investigated using the cloned
fiber length genes.
A total of 474 GFL (Gossypium
Fiber Length) genes were cloned. The effect of each GFL gene on UHML varied from 2.64% to 7.92%. Of 474 GFL genes, 88.6% decreased UHML when turned on or actively expressed in the developing fibers at the 10 days post-anthesis (10-dpa), whereas only 11.4% increased UHML. The GFL genes encode proteins and enzymes that are involved in a variety of biological processes and metabolic pathways. The 474 GFL genes interacted to form an interaction network in the 10-dpa fibers, which suggests that UHML is the consequence of interactions among the GFL genes. In addition, the evolution of
fiber length was examined between diploid and tetraploid cottons using the GFL genes. The results showed that the variation of the GFL gene networks, including the number of genes and number of gene x gene interactions, also plays an important role in the variation of
fiber length during polyploidization.
Therefore, this study has, for the first time worldwide, cloned a large number of genes controlling UHML and deciphered the underlying molecular basis and regulation mechanisms, thus providing novel resources and knowledge for development of new toolkits for enhanced cotton
fiber breeding. The UHML is determined not only by its controlling genes, GFLs, but also by their actions, action directions and interactions. Moreover, the results of this study have not only provided a first line of evidence that a quantitative trait is controlled by a large number of genes, but also added new molecular basis, thus forming the molecular mechanisms of quantitative genetics.
Advisors/Committee Members: Zhang, Hongbin (advisor), Smith, C. Wayne (advisor), Hague, Steve (committee member), Yuan, Joshua (committee member).
Subjects/Keywords: Cotton; Fiber; UHML
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APA (6th Edition):
Liu, Y. H. (2014). Molecular Basis of Quantitative Genetics Revealed by Cloning and Analysis of 474 Genes Controlling Fiber Length in Cotton. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153405
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Liu, Yun Hua. “Molecular Basis of Quantitative Genetics Revealed by Cloning and Analysis of 474 Genes Controlling Fiber Length in Cotton.” 2014. Thesis, Texas A&M University. Accessed September 20, 2019.
http://hdl.handle.net/1969.1/153405.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liu, Yun Hua. “Molecular Basis of Quantitative Genetics Revealed by Cloning and Analysis of 474 Genes Controlling Fiber Length in Cotton.” 2014. Web. 20 Sep 2019.
Vancouver:
Liu YH. Molecular Basis of Quantitative Genetics Revealed by Cloning and Analysis of 474 Genes Controlling Fiber Length in Cotton. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/1969.1/153405.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Liu YH. Molecular Basis of Quantitative Genetics Revealed by Cloning and Analysis of 474 Genes Controlling Fiber Length in Cotton. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153405
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
21.
Sabeel ahmed K.
Investigations on mechanical Performance characteristics
of Jute glass fiber hybrid composites;.
Degree: Investigations on mechanical Performance
characteristics of Jute glass fiber hybrid composites, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/26492
► Fiber reinforced composites have emerged as a major class of newlinestructural material in many weight critical components in aerospace newlineautomotive and other industrial sectors due…
(more)
▼ Fiber reinforced composites have emerged as a major
class of newlinestructural material in many weight critical
components in aerospace newlineautomotive and other industrial
sectors due to their advantages like high newlinestrength to weight
ratio high stiffness to weight ratio good wear and newlinecorrosion
resistance high temperature resistance etc Despite several
newlineadvantages they have certain drawbacks which include high
cost abrasive newlinenature high energy consumption during
processing non biodegradability newlinenon renewability scarcity
etc These drawbacks limit the use of conventional newlinefiber
composites mainly for aerospace and military applications where
high newlinecost of the fiber is not of high importanc newline
newline newline
appendix p197-205, reference
p206-217.
Advisors/Committee Members: Vijayarangan S.
Subjects/Keywords: Jute glass fiber
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Manager
APA (6th Edition):
K, S. a. (2014). Investigations on mechanical Performance characteristics
of Jute glass fiber hybrid composites;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/26492
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
K, Sabeel ahmed. “Investigations on mechanical Performance characteristics
of Jute glass fiber hybrid composites;.” 2014. Thesis, Anna University. Accessed September 20, 2019.
http://shodhganga.inflibnet.ac.in/handle/10603/26492.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
K, Sabeel ahmed. “Investigations on mechanical Performance characteristics
of Jute glass fiber hybrid composites;.” 2014. Web. 20 Sep 2019.
Vancouver:
K Sa. Investigations on mechanical Performance characteristics
of Jute glass fiber hybrid composites;. [Internet] [Thesis]. Anna University; 2014. [cited 2019 Sep 20].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26492.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
K Sa. Investigations on mechanical Performance characteristics
of Jute glass fiber hybrid composites;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26492
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Addis Ababa University
22.
Mekuanint, Lemlem.
INVESTIGATION OF THE EFFECTS OF MACRO BENDING LOSS ON STEP INDEX SINGLE MODE FIBER
.
Degree: 2013, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/1329
► The objective of the thesis are to calculate power loss due to bending, to determine the spectral window at which ber can e ectively operates,…
(more)
▼ The objective of the thesis are to calculate power loss due to bending, to determine
the spectral window at which ber can e ectively operates, to predict bend loss for a
higher wavelength from the trend of shorter wavelengths and investigates the variation
constants of optical ber (MAC) factor,with respect to using Laser stage lighting, He-Ne
laser and Diode laser, with wavelengths in the visible and infra red region of an optical
spectrum.
In this thesis, a single mode ber (SMF) was bent to various bend radius with a spe-
cially designed, adjustable ber bending device and out put power was measured using
a lock in ampli er. Thus, studying the relationship between macro bending and atten-
uation would enable us to maximize the performance of an optical ber. As a whole in
my experimental investigation was made of the bending losses in step index single mode
ber wave guide with di erent parameters of the equivalent step pro le for bending radii
from 0.5cm to 10.05cm with steps of 0.5cm, with the attenuation coe cient range is 0.045
dB/m to 0.475 dB/m,0.065 dB/m to 0.48 dB/m and 0.10 dB/m to 0.61 dB/m for the
wavelengths 532nm, 633nm and 808nm respectively
As signal wavelength passes the cut o wavelength, attenuation decreases sharply due
to disappearance of higher order mode. At wavelengths longer than cut o wavelength,
attenuation increases with wavelength increases. Furthermore, attenuation is inversely
proportional to bending radius measured at transmission wavelengths increases.
This study shows that attenuation introduced by macro bending depends on wave-
length and bending radius. Based on these ndings, one can minimize the adverse impact
of macro bending. As a whole the results from the experiment have suggested that the
optical power loss due to bending at the visible spectrum is more apparent than loss due
to other e ects such as absorption and scattering.
Advisors/Committee Members: Prof.A.V.Gholap (advisor).
Subjects/Keywords: BENDING LOSS;
FIBER
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APA (6th Edition):
Mekuanint, L. (2013). INVESTIGATION OF THE EFFECTS OF MACRO BENDING LOSS ON STEP INDEX SINGLE MODE FIBER
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1329
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mekuanint, Lemlem. “INVESTIGATION OF THE EFFECTS OF MACRO BENDING LOSS ON STEP INDEX SINGLE MODE FIBER
.” 2013. Thesis, Addis Ababa University. Accessed September 20, 2019.
http://etd.aau.edu.et/dspace/handle/123456789/1329.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mekuanint, Lemlem. “INVESTIGATION OF THE EFFECTS OF MACRO BENDING LOSS ON STEP INDEX SINGLE MODE FIBER
.” 2013. Web. 20 Sep 2019.
Vancouver:
Mekuanint L. INVESTIGATION OF THE EFFECTS OF MACRO BENDING LOSS ON STEP INDEX SINGLE MODE FIBER
. [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2019 Sep 20].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/1329.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mekuanint L. INVESTIGATION OF THE EFFECTS OF MACRO BENDING LOSS ON STEP INDEX SINGLE MODE FIBER
. [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1329
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
23.
Shin, Chun-Sheng.
Fiber Laser Sensor using PCF-based Mach-Zehnder Interferometer Formed by Misalinged Splicing.
Degree: Master, Electro-Optical Engineering, 2015, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623115-001116
► Optical sensors based on fiber interferometers have been investigated extensively due to their significant advantages of compact size, low cost and immunity to electromagnetic interference.…
(more)
▼ Optical sensors based on
fiber interferometers have been investigated extensively due to their significant advantages of compact size, low cost and immunity to electromagnetic interference. However, their accuracy is poor due to the broad 3-dB bandwidth and low extinction ratio of the interference spectrum. In this dissertation, we fabricate a
fiber Mach-Zehnder interferometer (MZI) by splicing a photonic crystal
fiber (PCF) with SMFs with an offset. Due to the misalignment of the two fibers, the input light from the SMF will induce the core mode and cladding mode of the PCF with different propagation velocities. These two modes are coupled back to the other SMF to form the interference spectrum due to the accumulated phase difference. We then place the PCF-based MZI into an erbium-doped
fiber ring laser to form the
fiber laser sensor. Compared with the spectrum of the PCF-based MZI, the lasing peak of the
fiber laser sensor has high signal to noise ratio (40dB) and narrow 3-dB bandwidth (<1nm), which can enhance the sensing accuracy.
We have demonstrated the sensing properties of our PCF-based MZI
fiber laser sensor for temperature, bending curvature and surrounding refractive index. The temperature sensitivity of the PCF-based MZI
fiber laser sensor is about 5pm/oC between 30 °C to 150 °C. As we increase the bending curvature from 0.6925m-1 to 3.096m-1, it is observed that the lasing wavelength is exponentially increased. In addition, the measured refractive-index sensitivity is about 52.35nm/RIU as the surrounding refractive index is varied from 1.3388 to 1.3638. As a result, our proposed PCF-based MZI
fiber laser sensors can be utilized as useful sensors which have high signal to noise ratio and narrow 3-dB bandwidth to enhance the sensing accuracy.
Advisors/Committee Members: Yung-Jr Hung (chair), Chin-Ping Yu (committee member), Jui-Yang Feng (chair), Hung-wen Chang (chair).
Subjects/Keywords: fiber laser sensor; fiber laser; fiber sensor; Photonic crystal fiber; Mach-Zehnder interferometer
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APA (6th Edition):
Shin, C. (2015). Fiber Laser Sensor using PCF-based Mach-Zehnder Interferometer Formed by Misalinged Splicing. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623115-001116
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shin, Chun-Sheng. “Fiber Laser Sensor using PCF-based Mach-Zehnder Interferometer Formed by Misalinged Splicing.” 2015. Thesis, NSYSU. Accessed September 20, 2019.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623115-001116.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shin, Chun-Sheng. “Fiber Laser Sensor using PCF-based Mach-Zehnder Interferometer Formed by Misalinged Splicing.” 2015. Web. 20 Sep 2019.
Vancouver:
Shin C. Fiber Laser Sensor using PCF-based Mach-Zehnder Interferometer Formed by Misalinged Splicing. [Internet] [Thesis]. NSYSU; 2015. [cited 2019 Sep 20].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623115-001116.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shin C. Fiber Laser Sensor using PCF-based Mach-Zehnder Interferometer Formed by Misalinged Splicing. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623115-001116
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Hawaii – Manoa
24.
Gudapati, Vamshi Mohan.
Processing and characterization of continuous fiber ceramic nanocomposites by preceramic polymer pyrolysis.
Degree: MS, 2011, University of Hawaii – Manoa
URL: http://hdl.handle.net/10125/20690
► xi, 61 leaves, bound ill. 29 cm
In this work, two types of Continuous Fiber Ceramic Composites (CFCCs) were manufactured using preceramic polymer pyrolysis method…
(more)
▼ xi, 61 leaves, bound ill. 29 cm
In this work, two types of Continuous Fiber Ceramic Composites (CFCCs) were manufactured using preceramic polymer pyrolysis method for corrosion and mechanical testing. The two types of fiber reinforcements were Nicalon™ and Carbon fibers, and KiON CERASET® preceramic polymer was used as the matrix in this study. Further, the effects of nanoparticles on processing and flexural mechanical performance of Nicalon/KiON CERASET® continuous fiber ceramic composites by preceramic polymer pyrolysis method have been investigated. Five different nanoparticles varying in size from 15-55 nanometers were used. These nanoparticles were: titanium oxide, yttrium oxide, zinc oxide, silicon carbide, and carbon. Nicalon™ ceramic fiber was used as the reinforcement. KiON preceramic polymer was mixed with nano size fillers in the presence of a surfactant agent to give a good dispersion of the particles and was used as the matrix. Initial work from nanoparticle reinforced CFCCs led to further investigations in the effects of using varying weight percentage of nanoparticle inclusions on mechanical performance of continuous fiber ceramic nanocomposites. Yttrium oxide nanoparticles with an average size of 29 nm was used as the inclusion with varying weight percentages of 5, 10, 15, and 20. Two different types of nanoparticle filled composites were manufactured through different processing routes. Characterization analysis and dispersion studies of the samples using scanning electron microscopy were reported. Four-point bending test was also conducted to evaluate the flexural mechanical performance of the ceramic nanocomposites samples at room temperature. Nanoparticle filled samples consistently showed significant improvement in flexural strength compared to their counterparts without nanoparticle reinforcement.
Subjects/Keywords: Fiber-reinforced ceramics
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APA (6th Edition):
Gudapati, V. M. (2011). Processing and characterization of continuous fiber ceramic nanocomposites by preceramic polymer pyrolysis. (Masters Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/20690
Chicago Manual of Style (16th Edition):
Gudapati, Vamshi Mohan. “Processing and characterization of continuous fiber ceramic nanocomposites by preceramic polymer pyrolysis.” 2011. Masters Thesis, University of Hawaii – Manoa. Accessed September 20, 2019.
http://hdl.handle.net/10125/20690.
MLA Handbook (7th Edition):
Gudapati, Vamshi Mohan. “Processing and characterization of continuous fiber ceramic nanocomposites by preceramic polymer pyrolysis.” 2011. Web. 20 Sep 2019.
Vancouver:
Gudapati VM. Processing and characterization of continuous fiber ceramic nanocomposites by preceramic polymer pyrolysis. [Internet] [Masters thesis]. University of Hawaii – Manoa; 2011. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/10125/20690.
Council of Science Editors:
Gudapati VM. Processing and characterization of continuous fiber ceramic nanocomposites by preceramic polymer pyrolysis. [Masters Thesis]. University of Hawaii – Manoa; 2011. Available from: http://hdl.handle.net/10125/20690
Baylor University
25.
[No author].
A Study of chemical treatments and processing for banana fiber-reinforced LDPE composites.
Degree: 2016, Baylor University
URL: http://hdl.handle.net/2104/9826
► Natural fiber-reinforced polymeric composites have been gaining popularity due to their low weight and high sustainability potential. Banana pseudo-stem fibers in particular present a unique…
(more)
▼ Natural
fiber-reinforced polymeric composites have been gaining popularity due to their low weight and high sustainability potential. Banana pseudo-stem fibers in particular present a unique opportunity for reinforcement since they are widely grown and are currently considered an agricultural waste product. However, poor bonding between the hydrophilic
fiber and a comparatively hydrophobic thermoplastic matrix, such as LDPE, have limited composite properties. This study looks at two known natural
fiber treatments designed to promote interfacial bonding, peroxide and permanganate treatment, and documents their effect on banana pseudo-stem fibers and a banana
fiber/LDPE injection molded composite. It was found that peroxide treatment enhances the strength of individual fibers but is thermally unstable. Permanganate treatment decreases the moisture absorption of the fibers and improves interfacial bonding but provides no advantage over untreated fibers in composite properties. This study also looks into special processing considerations for injection molding natural
fiber composite parts.
Advisors/Committee Members: Jordan, William Mark, 1950- (advisor).
Subjects/Keywords: Banana fiber. LDPE
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APA (6th Edition):
author], [. (2016). A Study of chemical treatments and processing for banana fiber-reinforced LDPE composites.
(Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/9826
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
author], [No. “A Study of chemical treatments and processing for banana fiber-reinforced LDPE composites.
” 2016. Thesis, Baylor University. Accessed September 20, 2019.
http://hdl.handle.net/2104/9826.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
author], [No. “A Study of chemical treatments and processing for banana fiber-reinforced LDPE composites.
” 2016. Web. 20 Sep 2019.
Vancouver:
author] [. A Study of chemical treatments and processing for banana fiber-reinforced LDPE composites.
[Internet] [Thesis]. Baylor University; 2016. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/2104/9826.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
author] [. A Study of chemical treatments and processing for banana fiber-reinforced LDPE composites.
[Thesis]. Baylor University; 2016. Available from: http://hdl.handle.net/2104/9826
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
26.
Baril, Neil F.
HIGH-PRESSURE MICROFLUIDIC CHEMICAL DEPOSITION: REPLACING
THE AIR WITHIN MICROSTRUCTURED OPTICAL FIBERS.
Degree: PhD, Chemistry, 2008, Penn State University
URL: https://etda.libraries.psu.edu/catalog/8906
► There is currently great interest in advancing both the fundamental technology and underlying science of electronics and photonics. As chemists we can contribute to this…
(more)
▼ There is currently great interest in advancing both
the fundamental technology and underlying science of electronics
and photonics. As chemists we can contribute to this area through
the synthesis and fabrication of new materials and materials
structures with novel or interesting optical and/or electronic
properties. Synthesis of materials within templates, in particular,
is one powerful tool for realizing this goal. In this work
microstructured optical fibers have been employed as templates for
the synthesis and organization of materials. High-pressure gas
mixtures containing chemical precursors have been configured to
flow through the capillaries of MOFs and thermally decomposed
depositing materials onto the walls of the capillaries. The
deposition of silicon and germanium within the capillaries of
various MOF templates has been investigated. The deposition
conditions, including temperature, pressure, and concentration,
have been refined such that it is possible to deposit solid
microwires of silicon and germanium several centimeters in length
within the MOFs. Deposition of germanium within a 100 nm capillary
over several centimeters has been demonstrated and confirmed by
Raman spectra and FESEM cross sections. The thermal annealing
conditions to produce high quality crystalline materials without
degradation of the MOF integrity have also been investigated.
Infiber solid polycrystalline silicon microwire waveguides
exhibiting low optical attenuation, 5.8dB/cm at 1.55 μm,
and high electron mobilities are demonstrated. This value is the
lowest reported for any type of polycrystalline silicon waveguide.
Junctions, which are the foundation of semiconductor devices, have
been produced within the capillaries of MOFs via sequential
deposition of materials. Semiconductorsemiconductor and
metal-semiconductor hetero-junctions are demonstrated.
Demonstration of such junctions opens the door to the fabrication
of many potential in-fiber devices. A traveling furnace platform
was constructed for the deposition of uniform layers. Deposition
with the traveling furnace is investigated and the formation of a
highly uniform layer in a 1 m long 100 μm capillary is
presented. The deposition of a silicon-germanium junction with
uniform thickness over 1 m in length is demonstrated. The
deposition chemistry of silicon carbide and silicon nitride has
also been investigated. The ability to tune material composition
and optical properties by adjusting the deposition temperature and
the concentration of hydrogen gas in the precursor gas mixture is
presented. Silicon carbide layers with uniform composition were
deposited within a 100 μm capillary using a traveling
furnace.
Subjects/Keywords: optical fiber; Silicon
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APA (6th Edition):
Baril, N. F. (2008). HIGH-PRESSURE MICROFLUIDIC CHEMICAL DEPOSITION: REPLACING
THE AIR WITHIN MICROSTRUCTURED OPTICAL FIBERS. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/8906
Chicago Manual of Style (16th Edition):
Baril, Neil F. “HIGH-PRESSURE MICROFLUIDIC CHEMICAL DEPOSITION: REPLACING
THE AIR WITHIN MICROSTRUCTURED OPTICAL FIBERS.” 2008. Doctoral Dissertation, Penn State University. Accessed September 20, 2019.
https://etda.libraries.psu.edu/catalog/8906.
MLA Handbook (7th Edition):
Baril, Neil F. “HIGH-PRESSURE MICROFLUIDIC CHEMICAL DEPOSITION: REPLACING
THE AIR WITHIN MICROSTRUCTURED OPTICAL FIBERS.” 2008. Web. 20 Sep 2019.
Vancouver:
Baril NF. HIGH-PRESSURE MICROFLUIDIC CHEMICAL DEPOSITION: REPLACING
THE AIR WITHIN MICROSTRUCTURED OPTICAL FIBERS. [Internet] [Doctoral dissertation]. Penn State University; 2008. [cited 2019 Sep 20].
Available from: https://etda.libraries.psu.edu/catalog/8906.
Council of Science Editors:
Baril NF. HIGH-PRESSURE MICROFLUIDIC CHEMICAL DEPOSITION: REPLACING
THE AIR WITHIN MICROSTRUCTURED OPTICAL FIBERS. [Doctoral Dissertation]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/8906
McMaster University
27.
Yang, Chenyu.
DESIGN AND ANALYSIS OF FREQUENCY MODULATED FIBER-OPTIC COMMUNICATION SYSTEM.
Degree: MASc, 2016, McMaster University
URL: http://hdl.handle.net/11375/20410
► Despite the fact that frequency modulation (FM) was firstly applied to radio signaling 80 years ago (1936, by Edwin Howard Armstrong), it has never been…
(more)
▼ Despite the fact that frequency modulation (FM) was firstly applied to radio signaling 80 years ago (1936, by Edwin Howard Armstrong), it has never been deployed in fiber-optic communication systems. In this thesis, a novel frequency modulated fiber-optic communication system with optical discriminator is proposed. The noise configuration and anti-dispersion property of the FM system are investigated through an analytical model that has been derived and validated with numerical simulations. The performance of the proposed FM system is compared with an amplitude modulated (AM) fiber-optic communication system, owing to the fact that the widely used modulation formats, intensity modulation and quadrature amplitude modulation (QAM), can be extracted as a model of the basic AM format. Depending on the property of the filter, two types of frequency discriminators are discussed: the leading edge filter (LEF) and the tail edge filter (TEF). Since the amplified spontaneous emission (ASE) noise is averagely distributed without any frequency dependence, the noise characteristics are not affected by the choice of the frequency discriminator. However, when it comes to the dispersion impairment, the difference between two frequency discriminators is dramatic because the distortion induced by dispersion strongly hinges on the operated frequency.
The results show that, with the presence of noise, the proposed FM scheme can lead to one or two orders of magnitude enhancement in the system’s output signal-to-noise ratio (SNR) as compared to that of the conventional AM scheme. Also, with the presence of dispersion, it is proved that the span of the FM system can reliably reach 110km with bit rate up to 10Gbit/s, surpassing the AM system with a maximum signal reach of 70km. A real application, with the presence of both noise and dispersion, demonstrates the overall superiority of the FM system’s performance over that of the AM system. The obtained results suggest a promising future for the FM technique in fiber-optic communication.
Thesis
Master of Applied Science (MASc)
Advisors/Committee Members: Li, Xun, Electrical and Computer Engineering.
Subjects/Keywords: Fiber-optic communication
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CSE |
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APA (6th Edition):
Yang, C. (2016). DESIGN AND ANALYSIS OF FREQUENCY MODULATED FIBER-OPTIC COMMUNICATION SYSTEM. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/20410
Chicago Manual of Style (16th Edition):
Yang, Chenyu. “DESIGN AND ANALYSIS OF FREQUENCY MODULATED FIBER-OPTIC COMMUNICATION SYSTEM.” 2016. Masters Thesis, McMaster University. Accessed September 20, 2019.
http://hdl.handle.net/11375/20410.
MLA Handbook (7th Edition):
Yang, Chenyu. “DESIGN AND ANALYSIS OF FREQUENCY MODULATED FIBER-OPTIC COMMUNICATION SYSTEM.” 2016. Web. 20 Sep 2019.
Vancouver:
Yang C. DESIGN AND ANALYSIS OF FREQUENCY MODULATED FIBER-OPTIC COMMUNICATION SYSTEM. [Internet] [Masters thesis]. McMaster University; 2016. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/11375/20410.
Council of Science Editors:
Yang C. DESIGN AND ANALYSIS OF FREQUENCY MODULATED FIBER-OPTIC COMMUNICATION SYSTEM. [Masters Thesis]. McMaster University; 2016. Available from: http://hdl.handle.net/11375/20410
McMaster University
28.
Fournier, Clementine.
Droplet migration on conical glass fibers.
Degree: MSc, 2018, McMaster University
URL: http://hdl.handle.net/11375/24114
► This thesis is centered on the study of spontaneous droplet migration along conical fibers. One of the key motivations for this project was to better…
(more)
▼ This thesis is centered on the study of spontaneous droplet migration along conical
fibers. One of the key motivations for this project was to better understand the
water-harvesting mechanism used by natural organisms like cacti. These desert plants
exploit the conical shape of their spines to make fog condense into small droplets at
the tip of theses spines. Then, droplets will spontaneously move towards the thickest
end of the spines, bringing water to the main body of the plant. The key force behind
drop migration on a conical fiber has been identified as the fluid surface tension by
Lorenceau an Quéré in 2004. These authors also suggested and tested a model
predicting the speed of drops on conical fibers. Here, we explore a larger range of
relative sizes of drops compared to the fiber radius.
The present document describes how an experimental set-up was designed in order
to study droplet migration with conical glass fibers and silicone oil droplets. Using
optical microscopy and data analysis, the droplet speed was measured as well as
the other experimental parameters. Finally, a simple theoretical model has been
developed to predict the droplet speed as a function of geometrical parameters and
fluid characteristics.
Thesis
Master of Science (MSc)
Advisors/Committee Members: Dalnoki-Veress, Kari, Physics and Astronomy.
Subjects/Keywords: drop conical fiber
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APA (6th Edition):
Fournier, C. (2018). Droplet migration on conical glass fibers. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/24114
Chicago Manual of Style (16th Edition):
Fournier, Clementine. “Droplet migration on conical glass fibers.” 2018. Masters Thesis, McMaster University. Accessed September 20, 2019.
http://hdl.handle.net/11375/24114.
MLA Handbook (7th Edition):
Fournier, Clementine. “Droplet migration on conical glass fibers.” 2018. Web. 20 Sep 2019.
Vancouver:
Fournier C. Droplet migration on conical glass fibers. [Internet] [Masters thesis]. McMaster University; 2018. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/11375/24114.
Council of Science Editors:
Fournier C. Droplet migration on conical glass fibers. [Masters Thesis]. McMaster University; 2018. Available from: http://hdl.handle.net/11375/24114
University of Melbourne
29.
YANG, YIZHUO.
Investigation on digitized RF transport over fiber.
Degree: 2011, University of Melbourne
URL: http://hdl.handle.net/11343/36352
► Wireless network based on radio-over-fiber (RoF) technologies is a promising solution to meet the ever increasing demand for larger transmission bandwidth. Such architecture moves most…
(more)
▼ Wireless network based on radio-over-fiber (RoF) technologies is a promising solution to meet the ever increasing demand for larger transmission bandwidth. Such architecture moves most of the processing, routing and switching functionalities to a centralized location with optical fiber backhaul providing high speed interconnection to a large number of antenna base stations. This thesis is focused on the investigation and development of novel technologies for the implementation of radio-over-fiber networks in order to realize ultra-high-speed, high-quality, and multi-service links that connect large numbers of radio base stations with the central office, simplify the architecture of remote base stations, and achieve both cost and energy efficiency.
A digitized RF-over-fiber transmission scheme based on bandpass sampling theory and commercial-available analog-to-digital/digital-to-analog converters (ADC/DAC) is introduced in this thesis. It takes advantage of the higher performance of digital optical links, the benefits of direct RF distribution to realize simpler base stations, and the use of existing optical access and metro network infrastructures. Theoretical analysis of the digitized RF-over-fiber link is carried out by examining noise sources; a comparison between digitized and analog RF-over-fiber links is made in terms of signal-to-noise ratio (SNR) and dynamic range. A low-cost digitized RF-over-fiber uplink transmission is demonstrated using commercially available Field-programmable Gate Array (FPGA) boards. This technique is further expanded to subcarrier multiplexed (SCM) RoF networks.
An efficient bidirectional transmission scheme for Hybrid Fiber-Radio (HFR) access using digitized RF-over-fiber technique is proposed, and it can support multiple wireless signals distribution for both uplink and downlink. Experimental demonstration of a proof-of-concept DRoF-HFR link for the simultaneous transmission of GSM, UMTS and WiMAX wireless services is presented. Error-free transmission is achieved for all three wireless signals in both the downstream and upstream directions. The thesis also investigated on the downlink power amplification requirement for wireless services at different wireless carrier frequencies.
A digitized radio-over-fiber link for 18 GHz RF signal transmission has been successfully demonstrated with error-free detection. The investigations on the impacts of carrier frequency, bit rate, ADC resolution and sampling rate on the system performance are presented. Two enhanced digitized RF-over-fiber techniques are proposed to reduce the optical data rate and moderate the hardware requirement.
Finally, the thesis investigates the power consumptions and energy-saving potentials of the fiber-wireless integration techniques. A mathematical model for estimating the base station power consumption is developed by evaluating…
Subjects/Keywords: radio over fiber
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APA ·
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APA (6th Edition):
YANG, Y. (2011). Investigation on digitized RF transport over fiber. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/36352
Chicago Manual of Style (16th Edition):
YANG, YIZHUO. “Investigation on digitized RF transport over fiber.” 2011. Doctoral Dissertation, University of Melbourne. Accessed September 20, 2019.
http://hdl.handle.net/11343/36352.
MLA Handbook (7th Edition):
YANG, YIZHUO. “Investigation on digitized RF transport over fiber.” 2011. Web. 20 Sep 2019.
Vancouver:
YANG Y. Investigation on digitized RF transport over fiber. [Internet] [Doctoral dissertation]. University of Melbourne; 2011. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/11343/36352.
Council of Science Editors:
YANG Y. Investigation on digitized RF transport over fiber. [Doctoral Dissertation]. University of Melbourne; 2011. Available from: http://hdl.handle.net/11343/36352
University of Ottawa
30.
Song, Jia.
Optical Frequency Domain Reflectometry: Sensing Range Extension and Enhanced Temperature Sensitivity
.
Degree: 2014, University of Ottawa
URL: http://hdl.handle.net/10393/31532
► Optical fiber sensors have attracted tremendous attention over last two decades and have been successfully employed in various sensing applications, including temperature, strain, current, and…
(more)
▼ Optical fiber sensors have attracted tremendous attention over last two decades and have been successfully employed in various sensing applications, including temperature, strain, current, and so on. Among all types of optical fiber sensors, optical frequency domain reflectometry (OFDR) has been widely studied for its merits of simple configurations, high spatial resolution and high sensing accuracy. However, current limitation on OFDR lies in the sensing range and sensing accuracy. The state of art performance of commercial OFDR provides ~70m sensing range as well as 0.1K temperature accuracy. This is not adequate for large building distributed health monitoring due to the limited sensing range. Besides, high temperature response is also on demand for high precision measurement. To resolve the above limitation, in this thesis two major subjects have been studied regarding improving the performance and applicability of OFDR: One aims at extending the sensing range of OFDR while the other one focuses on enhancing temperature sensitivity of OFDR.
Firstly, we proposed novel data resampling approach regarding tuning nonlinearities of laser source to extend the sensing range. Commercial OFDR employs auxiliary interferometer (AI) to trigger data acquisition, where the maximum sensing range is limited to a quarter of the optical path difference (OPD) of AI according to Nyquist Sampling theorem. By employing the data resampling algorithm, the sensing range is no longer restricted by OPD and can even reach laser coherent length since OFDR is based on coherent detection scheme. Three data resampling algorithms are individually discussed and a sensing range of ~300m (~4 times the sensing range of commercial OFDR) with 8cm spatial resolution is for the first time achieved.
Secondly, the temperature response of OFDR is enhanced and we successfully achieved high temperature accuracy distributed sensing. One advantage of high temperature response is to enhance the spatial resolution since less spatial points are required in performing cross-correlation, while the other advantage is to obtain high temperature accuracy measurement at the same spatial resolution compared to that of traditional OFDR. This is especially important for maintaining spatial resolution under long range OFDR sensing since the total wavelength tuning range is smaller than traditional OFDR. Commonly the temperature response of single mode fiber is contributed by both thermal expansion coefficient and thermal optic coefficient of the waveguide and can be enhanced by increasing either of those coefficients. Thermal expansion coefficient is related with material property and is a weighted value of both bare fiber and coating. By using a large thermal expansion coefficient acrylic plank as a “coating” on SMF, we achieved ~9 times temperature response (~95 pm/ ˚C) compared with SMF (~10 pm/ ˚C). Further experiment is demonstrated with small diameter taper on an acrylic plank “coating”, in which case both thermal expansion coefficient and thermal optic coefficient…
Subjects/Keywords: Fiber;
Optics;
Sensing
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APA ·
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MLA ·
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APA (6th Edition):
Song, J. (2014). Optical Frequency Domain Reflectometry: Sensing Range Extension and Enhanced Temperature Sensitivity
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/31532
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Song, Jia. “Optical Frequency Domain Reflectometry: Sensing Range Extension and Enhanced Temperature Sensitivity
.” 2014. Thesis, University of Ottawa. Accessed September 20, 2019.
http://hdl.handle.net/10393/31532.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Song, Jia. “Optical Frequency Domain Reflectometry: Sensing Range Extension and Enhanced Temperature Sensitivity
.” 2014. Web. 20 Sep 2019.
Vancouver:
Song J. Optical Frequency Domain Reflectometry: Sensing Range Extension and Enhanced Temperature Sensitivity
. [Internet] [Thesis]. University of Ottawa; 2014. [cited 2019 Sep 20].
Available from: http://hdl.handle.net/10393/31532.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Song J. Optical Frequency Domain Reflectometry: Sensing Range Extension and Enhanced Temperature Sensitivity
. [Thesis]. University of Ottawa; 2014. Available from: http://hdl.handle.net/10393/31532
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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Open Access Theses and Dissertations
