Tang Wing-Wa. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references. / Abstracts in English and Chinese. / Abstract --- p.i / Acknowledgement --- p.iv / Table of contents --- p.v / List of figure --- p.viii / Chapter 1. --- Introduction --- p.1 / Chapter 1.1. --- Introduction to ultrashort optical pulse generation --- p.2 / Chapter 1.2. --- Introduction to wavelength-tunable pulse generation --- p.5 / Chapter 1.3. --- Introduction to chapters --- p.7 / Chapter 2. --- Principles and Theories --- p.11 / Chapter 2.1. --- Principle of dispersion tuning --- p.12 / Chapter 2.2. --- SOA nonlinear optical loop mirror --- p.16 / Chapter 2.3. --- Principle of dispersion tuning in harmonically mode-locked fiber laser using nonlinear optical loop mirror --- p.19 / Chapter 2.4. --- Principle of re-configurable multi-wavelength pulses generationin a self-seeded laser diode incorporating SOA loop mirror --- p.22 / Chapter 3. --- Rational harmonic mode-locking of an optically triggered fiber laser incorporating a non-linear optical loop modulator --- p.25 / Chapter 3.1. --- Introduction --- p.26 / Chapter 3.2. --- Experiment --- p.27 / Chapter 3.3. --- Result and discussion --- p.30 / Chapter 3.4. --- Summary --- p.37 / Chapter 4. --- Generation of amplitude-equalized optical pulses from a rational harmonic mode-locked fiber laser incorporating a SOA loop modulator --- p.40 / Chapter 4.1. --- Introduction --- p.41 / Chapter 4.2. --- Experiment --- p.42 / Chapter 4.3. --- Result and discussion --- p.44 / Chapter 4.4. --- Summary --- p.47 / Chapter 5. --- Optically controlled dispersion-tuning in harmonically mode-locked erbium doped fiber laser using SOA nonlinear loop modulator --- p.49 / Chapter 5.1. --- Introduction --- p.50 / Chapter 5.2. --- Experiment --- p.51 / Chapter 5.3. --- Result and discussion --- p.54 / Chapter 5.4. --- Summary --- p.58 / Chapter 6. --- Alternate method of constructing harmonically mode-locked fiber laser incorporating SOA nonlinear loop modulator --- p.60 / Chapter 6.1. --- Introduction --- p.61 / Chapter 6.2. --- Experiment --- p.62 / Chapter 6.3. --- Result and discussion --- p.65 / Chapter 6.4. --- Summary --- p.69 / Chapter 7. --- Optically re-configurable multi-wavelength pulse source constructed from a self-seeded laser diode --- p.71 / Chapter 7.1. --- Introduction --- p.72 / Chapter 7.2. --- Experiment --- p.74 / Chapter 7.3. --- Result and discussion --- p.77 / Chapter 7.4. --- Summary --- p.82 / Chapter 8. --- Tunable alternating multi-wavelength pulse source constructed using non-linear optical control of wavelength switching in a self-seeded laser diode --- p.85 / Chapter 8.1. --- Introduction --- p.86 / Chapter 8.2. --- Experiment --- p.87 / Chapter 8.3. --- Result and discussion --- p.89 / Chapter 8.4. --- Summary --- p.92 / Chapter 9. --- Conclusion and future works --- p.94 / Chapter 9.1. --- Conclusion --- p.94 / Chapter 9.2. --- Possible future works --- p.98 / Appendix / List of publications --- p.A-1

by Leung Yiu Tong. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 96-98). / Abstracts in English and Chinese. / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Motivation --- p.1 / Chapter 1.2 --- Thesis Organization --- p.3 / Chapter 2. --- Storage Network Fundamentals --- p.4 / Chapter 2.1 --- Storage Network Topology --- p.4 / Chapter 2.1.1 --- Direct Attached Storage (DAS) --- p.5 / Chapter 2.1.2 --- Network Attached Storage (NAS) --- p.7 / Chapter 2.1.3 --- Storage Area Network (SAN) --- p.9 / Chapter 2.1.3.1 --- SAN and the Fibre Channel Protocol --- p.11 / Chapter 2.1.4 --- Summary on Storage Network Topology --- p.12 / Chapter 2.2 --- Storage Protocol --- p.15 / Chapter 2.2.1 --- Fibre Channel --- p.15 / Chapter 2.2.1.1 --- Fibre Channel over IP (FCIP) --- p.17 / Chapter 2.2.1.2 --- Internet Fibre Channel Protocol (iFCP) --- p.19 / Chapter 2.2.2 --- Internet SCSI (iSCSI) --- p.20 / Chapter 2.2.3 --- InfiniBand --- p.22 / Chapter 2.2.4 --- Review on Storage Network Protocol --- p.25 / Chapter 2.3 --- Standard Organization --- p.27 / Chapter 2.4 --- Summary --- p.28 / Chapter 3. --- Switching Design for Storage Networks --- p.30 / Chapter 3.1. --- Shared Bus Design --- p.32 / Chapter 3.2. --- Time Division Switch --- p.36 / Chapter 3.3. --- Share Buffer Memory Switch --- p.37 / Chapter 3.3.1 --- Parallel Memory Array --- p.40 / Chapter 3.3.2 --- Distributive Storage --- p.43 / Chapter 3.4. --- Crossbar Switch --- p.45 / Chapter 3.4.1 --- Arbitrated Crossbar vs. Buffered Crossbar --- p.46 / Chapter 3.4.1.1 --- Arbitrated Crossbar Switch --- p.47 / Chapter 3.4.1.2 --- Buffered Crossbar Switch --- p.48 / Chapter 3.4.2 --- Switch Scheduling --- p.49 / Chapter 3.4.2.1 --- Bipartite Matching --- p.50 / Chapter 3.4.2.2 --- Token-based Distributive Scheduling --- p.53 / Chapter 3.4.2.3 --- Resource Counting using Semaphore --- p.56 / Chapter 3.5. --- Algebraic Switches --- p.60 / Chapter 3.5.1 --- Switching by Conditionally Nonblocking Properties --- p.61 / Chapter 3.5.2 --- Self-Routing Mechanism with Zero-Bit Buffering --- p.64 / Chapter 3.5.3 --- Multistage Interconnection of Self-routing Concentrators --- p.69 / Chapter 3.6. --- Summary --- p.73 / Chapter 4. --- Investigating Switching Issue in Storage Networks --- p.74 / Chapter 4.1 --- Choosing a Suitable Switch --- p.74 / Chapter 4.2 --- Quality of Service (QoS) --- p.76 / Chapter 4.3 --- Multicasting --- p.77 / Chapter 4.3.1 --- Crossbar Switch --- p.78 / Chapter 4.3.2 --- Shared-Buffer Memory Switches --- p.80 / Chapter 4.3.3 --- Algebraic Switch --- p.82 / Chapter 4.3.4 --- Application on Multicast Transmission --- p.86 / Chapter 4.4 --- Load Balancing Mechanism --- p.87 / Chapter 4.5 --- Optimization on Storage Utilization --- p.91 / Chapter 4.6 --- Summary --- p.93 / Chapter 5. --- Conclusion and Summary of Original Contributions --- p.94

Li Cheng. / Thesis submitted in: November 2002. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 57-61). / Abstracts in English and Chinese. / Chapter CHAPTER 1 --- INTRODUCTION --- p.1 / Chapter 1.1 --- The Evolution of Ring Network Technologies --- p.1 / Chapter 1.1.1 --- Token Ring Technology --- p.1 / Chapter 1.1.2 --- Resilient Packet Ring Technology --- p.4 / Chapter 1.2 --- Optimal Routing --- p.7 / Chapter 1.3 --- Fairness --- p.8 / Chapter 1.4 --- Outline of Thesis --- p.10 / Chapter CHAPTER 2 --- OPTIMAL ROUTING --- p.11 / Chapter 2.1 --- Throughput Analysis --- p.11 / Chapter 2.2 --- Numerical Results --- p.13 / Chapter CHAPTER 3 --- OPTIMAL FAIR ROUTING --- p.19 / Chapter 3.1 --- Overview --- p.19 / Chapter 3.2 --- Max-min Fair Allocation --- p.19 / Chapter 3.3 --- Proportionally Fair Allocation --- p.32 / Chapter 3.4 --- Numerical Results --- p.33 / Chapter CHAPTER 4 --- TRADEOFF ANALYSIS --- p.40 / Chapter 4.1 --- Tradeoff between Throughput and Max-min Fairness --- p.40 / Chapter 4.2 --- Numerical Results --- p.42 / Chapter 4.3 --- Tradeoff between Throughput and Utility --- p.47 / Chapter 4.4 --- Numerical Results --- p.48 / Chapter CHAPTER 5 --- CONCLUSION --- p.54 / Chapter 5.1 --- Summary --- p.54 / Chapter 5.2 --- Discussion and Future Work --- p.55 / BIBLIOGRAPHY --- p.57

In this thesis, the development of a novel electro-thermally actuated bi-stable out-of-plane two way actuated buckled micro-bridge for a potential application in optical switching is presented. The actuator consists of a bridge supported by 'legs' and springs at its four corners. The springs and the bridge are made of a tri-layer structure comprising of 2.5??m thick low-stress PECVD oxide, 1??m thick high-stress PECVD oxide and 2??m thick heavily phosphorus doped silicon. The legs, on the other hand, are 2??m thick single layer heavily phosphorus doped silicon. Both legs and springs provide elastically constrained boundary conditions at the supporting ends, without of which important features of the micro-bridge actuator could not have been achieved. This microbridge actuator is designed, simulated using ANSYS, fabricated and tested. The results from the testing have shown a good agreement with analytical prediction and ANSYS simulation. The actuator demonstrated bi-stability, two-way actuation and 31??m out-of-plane movement between the two-states using low voltage drive. Buckled shape model, design method for bi-stability and thermo-mechanical model are developed and employed in the design of the micro-bridge. These models are compared with Finite Element (FE) based ANSYS simulation and measurements from the fabricated micro-bridge and have shown a good agreement. In order to demonstrate the potential application of this actuator to optical switching, ANSYS simulation studies have been performed on a micro-mirror integrated with the micro-bridge actuator. From these studies, the optimum micro-mirror size that is appropriate for the integration has been obtained. This optimal mirror size ensures the important features of the actuator. Mirror fabrication experiments in (110) wafer have been carried out to find out the appropriate compensation mask size for a given etch depth and the suitable wafer thickness that can be used to fabricate the integrated system.

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In this thesis, the development of a novel electro-thermally actuated bi-stable out-of-plane two way actuated buckled micro-bridge for a potential application in optical switching is presented. The actuator consists of a bridge supported by 'legs' and springs at its four corners. The springs and the bridge are made of a tri-layer structure comprising of 2.5??m thick low-stress PECVD oxide, 1??m thick high-stress PECVD oxide and 2??m thick heavily phosphorus doped silicon. The legs, on the other hand, are 2??m thick single layer heavily phosphorus doped silicon. Both legs and springs provide elastically constrained boundary conditions at the supporting ends, without of which important features of the micro-bridge actuator could not have been achieved. This microbridge actuator is designed, simulated using ANSYS, fabricated and tested. The results from the testing have shown a good agreement with analytical prediction and ANSYS simulation. The actuator demonstrated bi-stability, two-way actuation and 31??m out-of-plane movement between the two-states using low voltage drive. Buckled shape model, design method for bi-stability and thermo-mechanical model are developed and employed in the design of the micro-bridge. These models are compared with Finite Element (FE) based ANSYS simulation and measurements from the fabricated micro-bridge and have shown a good agreement. In order to demonstrate the potential application of this actuator to optical switching, ANSYS simulation studies have been performed on a micro-mirror integrated with the micro-bridge actuator. From these studies, the optimum micro-mirror size that is appropriate for the integration has been obtained. This optimal mirror size ensures the important features of the actuator. Mirror fabrication experiments in (110) wafer have been carried out to find out the appropriate compensation mask size for a given etch depth and the suitable wafer thickness that can be used to fabricate the integrated system.

by John Ippocratis Capetanakis. / Originally presented as the author's thesis, (Ph.D.) in the M.I.T. Dept. of Electrical Engineering and Computer Science, 1978. / Prepared under Office of Naval Research Contract ONR-N00014-64-C-1183. / Includes bibliographical references.

The invention of the telephone and the telegraph opened the door to worldwide corrmunications. Over the years, complex and versatile corrmunication systems have evolved involving many devices and technologies. Switching protocols between switching offices have been established in accordance with the nature of the machines and with the capabilities of the transmission medium and its environment. Switching systems are now stored program oriented, providing a more generalized and digitally oriented internal switching capability. This report will discuss the Time Slot Interchange ( TSI), an important component of the Digital Central Office (DCO). The operation of the send section and the receive section and their relationship to the port group highways and cross office highways are presented in detail. The various TSI corrmands for performing the necessary operations are discussed. The TSI considered is that designed by Stromberg-Carlson, and future design trends in the design are presented.

Sun Weng Hong. / Thesis submitted in: October 2002. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 116-121). / Abstracts in English and Chinese. / Chapter 1. --- Introduction --- p.7 / Chapter 2. --- Ant Colony Optimization (ACO) --- p.9 / Chapter 2.1 --- ACO vs. Traditional Routing --- p.10 / Chapter 2.1.1 --- Routing information --- p.10 / Chapter 2.1.2 --- Routing overhead --- p.12 / Chapter 2.1.3 --- Adaptivity and Stagnation --- p.14 / Chapter 2.2 --- Approaches to Mitigate Stagnation --- p.15 / Chapter 2.2.1 --- Pheromone control --- p.15 / Chapter 2.2.1.1 --- Evaporation: --- p.15 / Chapter 2.2.1.2 --- Aging: --- p.16 / Chapter 2.2.1.3 --- Limiting and smoothing pheromone: --- p.17 / Chapter 2.2.2 --- Pheromone-Heuristic Control --- p.18 / Chapter 2.2.3 --- Privileged Pheromone Laying --- p.19 / Chapter 2.2.4 --- Critique and Comparison --- p.21 / Chapter 2.2.4.1 --- Aging --- p.22 / Chapter 2.2.4.2 --- Limiting pheromone --- p.22 / Chapter 2.2.4.3 --- Pheromone smoothing --- p.23 / Chapter 2.2.4.4 --- Evaporation --- p.25 / Chapter 2.2.4.5 --- Privileged Pheromone Laying --- p.25 / Chapter 2.2.4.6 --- Pheromone-heuristic control --- p.26 / Chapter 2.3 --- ACO in Routing and Load Balancing --- p.27 / Chapter 2.3.1 --- Ant-based Control and Its Ramifications --- p.27 / Chapter 2.3.2 --- AntNet and Its Extensions --- p.35 / Chapter 2.3.3 --- ASGA and SynthECA --- p.40 / Chapter 3. --- Multiple Ant Colony Optimization (MACO) --- p.45 / Chapter 4. --- MACO vs. ACO --- p.51 / Chapter 4.1 --- Analysis of MACO vs. ACO --- p.53 / Chapter 5. --- Applying MACO in Load Balancing --- p.89 / Chapter 5.1 --- Applying MACO in Load-balancing --- p.89 / Chapter 5.2 --- Problem Formulation --- p.91 / Chapter 5.3 --- Types of ant in MACO --- p.93 / Chapter 5.3.1 --- Allocator. --- p.94 / Chapter 5.3.2 --- Destagnator. --- p.95 / Chapter 5.3.3 --- Deallocator. --- p.100 / Chapter 5.4 --- Global Algorithm --- p.100 / Chapter 5.5 --- Discussion of the number of ant colonies --- p.103 / Chapter 6. --- Experimental Results --- p.105 / Chapter 7. --- Conclusion --- p.114 / Chapter 8. --- References --- p.116 / Appendix A. Ants in MACO --- p.122 / Appendix B. Ants in SACO. --- p.123