[pt] Neste trabalho, o Método dos Elementos Finitos (MEF) é aplicado na análise do campo eletromagnético em dutos metálicos, utilizados no transporte de óleo e gás. Instrumentos de inspeção podem utilizar esse método para verificar a existência de anomalias do tipo amassamentos e corrosões nos dutos, contribuindo para evitar vazamentos que podem causar acidentes ecológicos. Atualmente, a técnica de fuga de campo magnético (MFL) é a mais utilizada para precisar a profundidade dos defeitos encontrados nos dutos devido ao processo localizado de corrosão, onde a espessura se reduz progressivamente até o inicio de um eventual vazamento. Os picos dos sinais de fluxo magnético defletido indicam a perda de massa metálica localizada. A profundidade dos defeitos é correlacionada com a amplitude dos picos. Neste trabalho, o algoritmo baseado em Método de Elementos Finitos é utilizado para avaliar o desempenho do MEF na localização da posição de defeitos na parede do duto, através dos picos que aparecem nos gráficos de campo magnético. Essa análise será feita utilizando-se dois tipos de alimentação na entrada do duto: (I) apenas propagação do modo fundamental TEM e (II) diferença de potencial entre os cilindros externo e interno do duto. Diversos tamanhos de deformação em posições diferentes do duto serão analisados para se determinar para quais tipos de problema o algoritmo é eficiente. / [en] In this work, the Finite Element Method (FEM) is applied in the analysis of electromagnetic field generated by instruments employed for inspection of pipelines for natural gas-transmission. Inspection instruments can use this method to evaluate anomalies as corrosion and kneading in the superficies of the pipelines. This can avoid leaking that can cause ecological accidents. The Magnetic Flux Leakage (MFL) is the oldest and most commonly used in-line inspection method for finding metal-loss regions in gas- transmission pipelines. MFL inspections are typically used to detect, locate, and characterize metal-loss and other anomalies in natural gas-transmission pipelines. The amplitude or magnitude of an MFL signal is strongly related to defect depth. Alternatively, in this work, an instrument that generates a TEM wave is explored for inspection of pipelines. To evaluate the field distribution inside the pipe, an algorithm based on Finite Element Method is used to detect and locate an anomaly in the pipeline. It is used two kinds of source in the duct´s port: (I) just propagation in the FEM basic mode and (II) different potential between the internal and external cylindrical duct. Several sizes of anomalies will be analyzed to identify for which kind of problems the algorithm is useful.

Professional imaging systems, particularly motion picture cameras, usually employ larger photosites and lower pixel counts than many amateur cameras. This results in the desirable characteristics of improved dynamic range, signal to noise and sensitivity. However, high performance optics often have frequency response characteristics that exceed the Nyquist limit of the sensor, which, if not properly addressed, results in aliasing artifacts in the captured image. Most contemporary still and video cameras employ various optically birefringent materials as optical low-pass filters (OLPF) in order to minimize aliasing artifacts in the image. Most OLPFs are designed as optical elements with a frequency response that does not change even if the frequency responses of the other elements of the capturing systems are altered. An extended evaluation of currently used birefringent-based OLPFs is provided. In this work, the author proposed and demonstrated the use of a parallel optical window p ositioned between a lens and a sensor as an OLPF. Controlled X- and Y-axes rotations of the optical window during the image exposure results in a manipulation of the system's point-spread function (PSF). Consequently, changing the PSF affects some portions of the frequency components contained in the image formed on the sensor. The system frequency response is evaluated when various window functions are used to shape the lens' PSF, such as rectangle, triangle, Tukey, Gaussian, Blackman-Harris etc. In addition to the ability to change the PSF, this work demonstrated that the PSF can be manipulated dynamically, which allowed us to modify the PSF to counteract any alteration of other optical elements of the capturing system. There are several instances presented in the dissertation in which it is desirable to change the characteristics of an OLPF in a controlled way. / In these instances, an OLPF whose characteristics can be altered dynamically results in an improvement of the image quality. / by Branko Petljanski. / Thesis (Ph.D.)--Florida Atlantic University, 2010. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2010. Mode of access: World Wide Web.

by Lui Bong Chun, Richard. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references. / Abstract / Acknowledgment / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Background for the Project --- p.1 / Chapter 1.1.1 --- Interests in Blue-Green Laser --- p.1 / Chapter 1.1.2 --- Progress of Blue-Green Laser --- p.2 / Chapter 1.2 --- The Aim of the Project --- p.3 / Chapter 1.3 --- Overview the Remaining Parts of this Thesis --- p.4 / Chapter 1.4 --- References --- p.6 / Chapter Chapter 2 --- Sum Frequency Generation --- p.8 / Chapter 2.1 --- Introduction --- p.8 / Chapter 2.2 --- Sum Frequency Generation --- p.8 / Chapter 2.2.1 --- Theoretical Background for Sum Frequency Generation --- p.9 / Chapter 2.2.2 --- The Coupled Wave Equations for SFG --- p.13 / Chapter 2.2.3 --- Phase Matching Considerations --- p.16 / Chapter 2.3 --- References --- p.18 / Chapter Chapter 3 --- Cerenkov Radiation --- p.19 / Chapter 3.1 --- Introduction --- p.19 / Chapter 3.2 --- The Properties of Cerenkov Radiation by Using TM Mode --- p.21 / Chapter 3.2.1 --- Refractive Index Notation --- p.23 / Chapter 3.2.2 --- Fundamental Wave TM Guides Mode --- p.23 / Chapter 3.2.3 --- Second Harmonic TM Radiation Mode --- p.24 / Chapter 3.2.4 --- Efficiency of SHG --- p.25 / Chapter 3.3 --- Simplified Model Analysis of Cerenkov Radiation in TE Mode --- p.29 / Chapter 3.4 --- Simulation --- p.33 / Chapter 3.4.1 --- Modeling the LiNb03 --- p.33 / Chapter 3.4.2 --- Modeling an Asymmetric Slab Waveguide ´ؤPMMA doped with MNA on Fused Quartz --- p.37 / Chapter 3.4.3 --- Modeling a Symmetric Slab Waveguide ´ؤPMMA doped with MNA on Fused Quartz --- p.42 / Chapter 3.5 --- References --- p.47 / Chapter Chapter 4 --- Ellipsometry --- p.49 / Chapter 4.1 --- Introduction --- p.49 / Chapter 4.2 --- General Principles --- p.49 / Chapter 4.3 --- Basic Operation --- p.50 / Chapter 4.4 --- The Optical Constants of the Bulk Materials --- p.51 / Chapter 4.5 --- Calculation the Refractive Index of the Substrates --- p.53 / Chapter 4.6 --- Ellipsometric Theory for the Thin Film --- p.57 / Chapter 4.7 --- Measurement the Refractive Index and the Thickness of the Thin Film --- p.59 / Chapter 4.7.1 --- Data --- p.62 / Chapter 4.7.2 --- Discussions --- p.73 / Chapter 4.8 --- Calculation the Refractive Index of the thin Film by Considering as a Bulk Material --- p.78 / Chapter 4.9 --- References --- p.80 / Chapter Chapter 5 --- Prism Coupling --- p.81 / Chapter 5.1 --- Introduction --- p.81 / Chapter 5.2 --- Coupling of a Plane Wave --- p.82 / Chapter 5.3 --- Numerical Approach for the Calculation of the Coupling Efficiency --- p.85 / Chapter 5.4 --- Experiment --- p.88 / Chapter 5.4.1 --- Experimental Setup --- p.88 / Chapter 5.4.2 --- Experimental Result and Discussions --- p.90 / Chapter 5.5 --- References --- p.92 / Chapter Chapter 6 --- Conclusion --- p.93 / Chapter Chapter 7 --- Future Plans --- p.96 / Chapter 7.1 --- Simplified Model of Corona Poling --- p.96 / Chapter 7.2 --- Advanced Models of Poling --- p.98 / Chapter 7.2.1 --- Slab Waveguide --- p.98 / Chapter 7.2.2 --- Channel Waveguide --- p.99 / Chapter 7.3 --- References --- p.100 / Chapter Appendix 1 --- Materials' Descriptions --- p.A-l / Chapter A.1.1 --- 2-Methyl-4-Nitoaniline --- p.A-1 / Chapter A.1.2 --- Poly ( Methyl Methacrylate ) --- p.A-3 / Chapter A.1.3 --- References --- p.A-4 / Chapter Appendix 2 --- Fabrication Procedures --- p.A-5 / Chapter A.2.1 --- Cleaning the Apparatus --- p.A-5 / Chapter A.2.2 --- Cleaning the Substrate --- p.A-5 / Chapter A.2.3 --- Thin film Fabrication --- p.A-5 / Chapter A.2.4 --- Thin Film Removal --- p.A-6 / Chapter A.2.5 --- References --- p.A-6 / Chapter Appendix 3 --- Alpha Step --- p.A-7 / Chapter A.3.1 --- Introduction --- p.A-7 / Chapter A.3.2 --- Experimental Setup --- p.A-8 / Chapter A.3.3 --- Experimental Results --- p.A-9 / Chapter A.3.3.1 --- Thin Film of PMMA without Dopant --- p.A-9 / Chapter A.3.3.2 --- Thin Film of PMMA doped with MNA --- p.A-19 / Chapter A.3.4 --- Discussions --- p.A-27 / Chapter A.3.5 --- References --- p.A-28 / Chapter Appendix 4 --- Scanning Electron Microscope --- p.A-29 / Chapter A.4.1 --- Scanning Electron Microscope --- p.A-29 / Chapter A.4.2 --- Reference --- p.A-30 / Chapter Appendix 5 --- Gaussian Beam & Coordinate System Transformation --- p.A-31 / Chapter A.5.1 --- Gaussian Beam in a Homogeneous Medium --- p.A-31 / Chapter A.5.2 --- Transformation of the Coordinate Systems --- p.A-32 / Chapter A.5.3 --- Reference --- p.A-32 / Chapter Appendix 6 --- Waist Size Measurement of Gaussian Beam --- p.A-33 / Chapter A.6.1 --- Waist Size Measurement of Gaussian Beam --- p.A-33 / Chapter A.6.2 --- References --- p.A-34 / Chapter Appendix 7 --- Quasi Phase Matching --- p.A-35 / Chapter A. 7.1 --- Introduction --- p.A-35 / Chapter A.7.2 --- Basic Concept of QPM --- p.A-36 / Chapter A.7.3 --- References --- p.A-38 / Chapter Appendix 8 --- Program Listing --- p.A-41 / Chapter A.8.1 --- Program Listing ( Chapter 3 ) --- p.A-41 / Chapter A.8.1.1 --- Program 3.1 (transcendental.m ) --- p.A-41 / Chapter A.8.1.2 --- Program 3.2 (linbo3.m) --- p.A-42 / Chapter A.8.2 --- Program Listing ( Chapter 4 ) --- p.A-45 / Chapter A.8.2.1 --- Program 4.1 ( ellipsometry.m ) --- p.A-45 / Chapter A.8.3 --- Program Listing ( Chapter 5 ) --- p.A-47 / Chapter A.8.3.1 --- Program 5.1 ( parameter.m ) --- p.A-47 / Chapter A.8.3.2 --- Program 5.2 ( coupling.m ) --- p.A-49 / Chapter A.8.3.3 --- Program 5.3 ( v_3_amp.m ) --- p.A-50 / Chapter A.8.3.4 --- Program 5.4 ( input_profile.m ) --- p.A-51

by Chan Lai Yin Simon. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references. / Chapter Chapter 1: --- Introduction / Chapter 1.1 --- Background --- p.1-2 / Chapter 1.2 --- Properties of the InGaAsP quaternary alloy on InP substrate --- p.2 / Chapter 1.2.1 --- Physical Properties of In1-xGaxASyP1-y on InP substrate --- p.3-4 / Chapter 1.2.2 --- Optical Properties of In1-xGaxASyP1-y on InP substrate --- p.4-7 / Chapter 1.2.3 --- Nonlinear Optical Property of InGaAsP --- p.7-9 / Chapter 1.3 --- Fabrication of InGaAsP/InP rib waveguide / Chapter 1.3.1 --- Epitaxial Growth of In1-xGaxASyP1-y on InP substrate by MOCVD --- p.9 / Chapter 1.3.2 --- Etching of the five layer In1-xGaxASyP1-y slab waveguide --- p.9-12 / Chapter 1.4 --- Overview of the thesis --- p.12-13 / References --- p.13-15 / Chapter Chapter 2: --- Modal analysis of the single mode III-V semiconductor waveguidesin multi-layer rib structure by Effective Index Method / Chapter 2.1 --- Introduction --- p.16-17 / Chapter 2.2 --- Modal analysis of the rib waveguides --- p.17-27 / Chapter 2.3 --- Optical Confinement in rib waveguide --- p.28-30 / Chapter 2.4 --- Conclusions and discussions --- p.30-31 / References --- p.31-33 / Chapter Chapter 3: --- Ultrashort Pulsewidth Measurement Part I / Chapter 3.1 --- Introduction --- p.34 / Chapter 3.2 --- Pulsewidth measurement by streak camera --- p.34-37 / Chapter 3.3 --- Pulsewidth measurement by nonlinear autocorrelation --- p.37-40 / Chapter 3.3.1 --- Second Harmonic Generation Autocorrelator --- p.40-43 / Chapter 3.3.2 --- Two Photon Fluorescence Autocorrelator --- p.43-44 / Chapter 3.4 --- Two Photon Absorption Waveguide Autocorrelator --- p.45 / Chapter 3.4.1 --- TPA theory --- p.45-48 / Chapter 3.4.2 --- Autocorrelation Measurement by TPA in InGaAsP Waveguide --- p.48-51 / Chapter 3.4.3 --- The Estimated performance of the TPA Waveguide Autocorrelator --- p.52 / References --- p.52-57 / Chapter Chapter 4: --- Ultrashort Pulsewidth Measurement Part II: High Sensitivity Two Photon Absorption InGaAsP Waveguide Autocorrelator for Low Power Pulsewidth Measurement of 1.55μm Waveguide Pulses / Chapter 4.1 --- Introduction --- p.58-60 / Chapter 4.2 --- Waveguide structures --- p.60 / Chapter 4.3 --- Practical Implementation of the TPA Waveguide Autocorrelator / Chapter 4.3.1 --- Mirror arrangement for the delay system --- p.61 -63 / Chapter 4.3.2 --- Alignment and Coupling of the InGaAsP/InP Waveguide --- p.63-64 / Chapter 4.3.3 --- TPA photocurrent detection --- p.64-65 / Chapter 4.4 --- Experimental results --- p.65-67 / Chapter 4.4.1 --- Pulsewidth measurement of the TPA InGaAsP waveguide autocorrelator --- p.67-71 / Chapter 4.4.2 --- Spectral analysis by the TPA InGaAsP waveguide autocorrelator --- p.71 -73 / Chapter 4.5 --- Conclusions and discussions --- p.73-75 / References --- p.75-78 / Chapter Chapter 5: --- Picosecond Pulses Generation by Colliding-Pulse Mode-locking of a Fabry-Perot Laser Diode with an Intra-cavity Gradual Degradation Defect / Chapter 5.1 --- Introduction --- p.79-80 / Chapter 5.2 --- Gain-switching --- p.80-84 / Chapter 5.3 --- Colliding Pulse Mode-locking --- p.84-85 / Chapter 5.3.1 --- Degradation of diode laser --- p.85-86 / Chapter 5.3.2 --- CPM Theory --- p.86-89 / Chapter 5.3.3 --- Experimental results --- p.89-92 / Chapter 5.4 --- Conclusions and discussions --- p.92-93 / References --- p.94-98 / Chapter Chapter 6: --- Conclusions / Chapter 6.1 --- Summary of the Research / Chapter 6.1.1 --- Theoretical Results --- p.99-100 / Chapter 6.1.2 --- Experimental Results --- p.101-104 / Chapter 6.2 --- Future Development / Chapter 6.2.1 --- Improvement of the TPA InGaAsP waveguide autocorrelator --- p.105 / Chapter 6.2.2 --- Future development of III-V semiconductor waveguides --- p.105-107 / References --- p.107-108 / Appendix --- p.109-121

by Yue Ping Zhang. / Publication date from spine. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves 194-200). / DEDICATION / ACKNOWLEDGMENTS / Chapter / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Brief Description of Tunnels --- p.1 / Chapter 1.2 --- Review of Tunnel Imperfect Waveguide Models --- p.2 / Chapter 1.3 --- Review of Tunnel Geometrical Optical Model --- p.4 / Chapter 1.4 --- Review of Tunnel Propagation Experimental Results --- p.6 / Chapter 1.5 --- Review of Existing Tunnel UHF Radio Communication Systems --- p.13 / Chapter 1.6 --- Statement of Problems to be Studied --- p.15 / Chapter 1.7 --- Organization --- p.15 / Chapter 2 --- Propagation in Empty Tunnels --- p.18 / Chapter 2.1 --- Introduction --- p.18 / Chapter 2.2 --- Propagation in Empty Tunnels --- p.18 / Chapter 2.2.1 --- The Imperfect Empty Straight Rectangular Waveguide Model --- p.19 / Chapter 2.2.2 --- The Hertz Vectors for Empty Straight Tunnels --- p.20 / Chapter 2.2.3 --- The Propagation Modal Equations for Empty Straight Tunnels --- p.23 / Chapter 2.2.4 --- The Propagation Characteristics of Empty Straight Tunnels --- p.26 / Chapter 2.2.5 --- Propagation Numerical Results in Empty Straight Tunnels --- p.30 / Chapter 2.3 --- Propagation in Empty Curved Tunnels --- p.36 / Chapter 2.3.1 --- The Imperfect Empty Curved Rectangular Waveguide Model --- p.37 / Chapter 2.3.2 --- The Hertz Vectors for Empty Curved Tunnels --- p.39 / Chapter 2.3.3 --- The Propagation Modal Equations for Empty Curved Tunnels --- p.41 / Chapter 2.3.4 --- The Propagation Characteristics of Empty Curved Tunnels --- p.43 / Chapter 2.2.5 --- Propagation Numerical Results in Empty Curved Tunnels --- p.47 / Chapter 2.4 --- Summary --- p.50 / Chapter 3 --- Propagation in Occupied Tunnels --- p.53 / Chapter 3.1 --- Introduction --- p.53 / Chapter 3.2 --- Propagation in Road Tunnels --- p.53 / Chapter 3.2.1 --- The Imperfect Partially Filled Rectangular Waveguide Model --- p.54 / Chapter 3.2.2 --- The Scalar Potentials for Road tunnels --- p.56 / Chapter 3.2.3 --- The Propagation Modal Equations for Road Tunnels --- p.59 / Chapter 3.2.4 --- Propagation Numerical Results in Road Tunnels --- p.61 / Chapter 3.3 --- Propagation in Railway Tunnels --- p.64 / Chapter 3.3.1 --- The Imperfect Periodically Loaded Rectangular Waveguide Model --- p.65 / Chapter 3.3.2 --- The Surface Impedance Approximation --- p.66 / Chapter 3.3.2.1 --- The Surface Impedance of a Semi-infinite Lossy Dielectric Medium --- p.66 / Chapter 3.3.2.2 --- The Surface Impedance of a Thin Lossy Dielectric Slab --- p.67 / Chapter 3.3.2.3 --- The Surface Impedance of a Three-layered Half Space --- p.69 / Chapter 3.3.2.4 --- The Surface Impedance of the Sidewall of a Train in a Tunnel --- p.70 / Chapter 3.3.3 --- The Hertz Vectors for Railway Tunnels --- p.71 / Chapter 3.3.4 --- The Propagation Modal Equations for Railway Tunnels --- p.73 / Chapter 3.3.5 --- The Propagation Characteristics of Railway Tunnels --- p.76 / Chapter 3.3.6 --- Propagation Numerical Results in Railway Tunnels --- p.78 / Chapter 3.4 --- Propagation in Mine Tunnels --- p.84 / Chapter 3.4.1 --- The Imperfect periodically Loaded Rectangular Waveguide Model --- p.85 / Chapter 3.4.2 --- The Hertz Vectors for Mine Tunnels --- p.86 / Chapter 3.4.3 --- The Propagation modal Equations for Mine Tunnels --- p.88 / Chapter 3.4.4 --- The Propagation Characteristics of Mine Tunnels --- p.95 / Chapter 3.4.5 --- Propagation Numerical Results in Mine Tunnels --- p.96 / Chapter 3.5 --- Summary --- p.97 / Chapter 4 --- Statistical and Deterministic Models of Tunnel UHF Propagation --- p.100 / Chapter 4.1 --- Introduction --- p.100 / Chapter 4.2 --- Statistical Model of Tunnel UHF Propagation --- p.100 / Chapter 4.2.1 --- Experiments --- p.101 / Chapter 4.2.1.1 --- Experimental Set-ups --- p.102 / Chapter 4.2.1.2 --- Experimental Tunnels --- p.104 / Chapter 4.2.1.3 --- Experimental Techniques --- p.106 / Chapter 4.2.2 --- Statistical Parameters --- p.109 / Chapter 4.2.2.1 --- Parameters to Characterize Narrow Band Radio Propagation Channels --- p.109 / Chapter 4.2.2.2 --- Parameters to Characterize Wide Band Radio Propagation Channels --- p.111 / Chapter 4.2.3 --- Propagation Statistical Results and Discussion --- p.112 / Chapter 4.2.3.1 --- Tunnel Narrow Band Radio Propagation Characteristics --- p.112 / Chapter 4.2.3.1.1 --- Power Distance Law --- p.114 / Chapter 4.2.3.1.2 --- The Slow Fading Statistics --- p.120 / Chapter 4.2.3.1.3 --- The Fast Fading Statistics --- p.122 / Chapter 4.2.3.2 --- Tunnel Wide Band Radio Propagation Characteristics --- p.125 / Chapter 4.2.3.2.1 --- RMS Delay Spread --- p.126 / Chapter 4.2.3.2.2 --- RMS Delay Spread Statistics --- p.130 / Chapter 4.3 --- Deterministic Model of Tunnel UHF Propagation --- p.132 / Chapter 4.3.1 --- The Tunnel Geometrical Optical Propagation Model --- p.134 / Chapter 4.3.2 --- The Tunnel Impedance Uniform Diffracted Propagation Model --- p.141 / Chapter 4.3.2.1 --- Determination of Diffraction Points --- p.146 / Chapter 4.3.2.2 --- Diffraction Coefficients for Impedance Wedges --- p.147 / Chapter 4.3.3 --- Comparison with Measurements --- p.151 / Chapter 4.3.3.1 --- Narrow Band Comparison of Simulated and Measured Results --- p.151 / Chapter 4.3.3.1.1 --- Narrow Band Propagation in Empty Straight Tunnels --- p.151 / Chapter 4.3.3.1.2 --- Narrow Band Propagation in Curved or Obstructed Tunnels --- p.154 / Chapter 4.3.3.2 --- Wide Band Comparison of Simulated and Measured Results --- p.158 / Chapter 4.3.3.2.1 --- Wide Band Propagation in Empty Straight Tunnels --- p.159 / Chapter 4.3.3.2.2 --- Wide Band Propagation in an Obstructed Tunnel --- p.163 / Chapter 4.4 --- Summary --- p.165 / Chapter 5 --- Propagation in Tunnel and Open Air Transition Region --- p.170 / Chapter 5.1 --- Introduction --- p.170 / Chapter 5.2 --- Radiation of Radio Waves from a Rectangular Tunnel into Open Air --- p.171 / Chapter 5.2.1 --- Radiation Formulation Using Equivalent Current Source Concept --- p.171 / Chapter 5.2.2 --- Radiation Numerical Results --- p.175 / Chapter 5.3 --- Propagation Characteristics of UHF Radio Waves in Cuttings --- p.177 / Chapter 5.3.1 --- The Attenuation Constant due to the Absorption --- p.178 / Chapter 5.3.2 --- The Attenuation Constant due to the Roughness of the Sidewalls --- p.182 / Chapter 5.3.3 --- The Attenuation Constant due to the tilts of the Sidewalls --- p.183 / Chapter 5.3.4 --- Propagation Numerical Results in Cuttings --- p.184 / Chapter 5.4 --- Summary --- p.187 / Chapter 6 --- Conclusion and Recommendation for Future Work --- p.189 / APPENDIX --- p.193 / The Approximate Solution of a Transcendental Equation --- p.193 / REFERENCES --- p.194

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1979. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Includes bibliographical references. / by André Antoine Merab. / M.S.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING / Includes bibliographical references. / by Scott Roger Shepard. / M.S.

Thesis. 1975. B.S. cn--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Includes bibliographical references. / B.S.cn

Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. / Vita. / Includes bibliographical references. / Ph.D.

Chen Fei. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (leaves 86-92). / Abstracts in English and Chinese. / Acknowledgements --- p.i / List of publications --- p.ii / Abstract (In English) --- p.iii / Abstract (In Chinese) --- p.v / Table of contents --- p.vii / List of figures --- p.x / List of tables --- p.xiv / Chapter Chapter I --- Introduction --- p.1 / Chapter Chapter II --- Sol-gel channel waveguides --- p.6 / Chapter 2.1 --- General sol-gel process --- p.6 / Chapter 2.2 --- Dye-doped sol-gel zirconia and zirconia-ORMOSIL materials --- p.10 / Chapter 2.3 --- Fabrication of sol-gel channel waveguides --- p.15 / Chapter 2.3.1 --- General process of the photolithographic technique --- p.15 / Chapter 2.3.2 --- Channels in glass substrates by using photolithographic wet etching technique --- p.19 / Chapter 2.3.3 --- Channels in fused silica substrates by using photolithographic dry etching technique (Inductive-coupled plasma etching) --- p.24 / Chapter Chapter III --- Coupled-wave theory and experimental setup of distributed feedback channel waveguide lasers --- p.27 / Chapter 3.1 --- Coupled-wave theory of distributed feedback lasers --- p.27 / Chapter 3.2 --- Experimental setup --- p.33 / Chapter Chapter IV --- One-dimensional and two-dimensional optical waveguide analysis --- p.37 / Chapter 4.1 --- 1-D planar waveguide analysis --- p.37 / Chapter 4.2 --- 2-D channel waveguide analysis using the Marcatili method --- p.39 / Chapter 4.2.1 --- The Eypq modes: Polarization in the y direction --- p.42 / Chapter 4.2.2 --- The Eypq modes: Polarization in the x direction --- p.46 / Chapter 4.3 --- 2-D channel waveguide analysis using the effective index method --- p.48 / Chapter Chapter V --- Distributed feedback channel waveguide lasers tunable in the visible --- p.50 / Chapter 5.1 --- Rhodamine 6G-doped zirconia planar and channel waveguides --- p.51 / Chapter 5.2 --- Results and discussion --- p.56 / Chapter 5.3 --- Summary --- p.66 / Chapter Chapter VI --- Near infrared distributed feedback channel waveguide lasers --- p.68 / Chapter 6.1 --- LDS dye-doped zirconia-ORMOSIL planar and channel waveguides --- p.68 / Chapter 6.2 --- Results and discussion --- p.72 / Chapter 6.3 --- Summary --- p.80 / Chapter Chapter VII --- Summary --- p.81 / References --- p.86