published_or_final_version / abstract / Electrical and Electronic Engineering / Doctoral / Doctor of Philosophy

The analogy of optical system to other physical systems has been attracting much attention over the past decades. In coupled optical lattices, phenomena originated from electronic systems, such as Bloch oscillations, Dynamic localization and Zener tunneling, have been extensively investigated and led to novel research directions and applications. Following this idea, harmonic oscillations are spatially mimicked by the propagation of supermodes in quadratically-coupled waveguide arrays. By analyzing the field envelope with the propagation constants and the superposition of the supermodes, we achieve conjugate-imaging at the half-period plane and self-imaging at the full-period plane, which give rise to the linear switching. Combining the linear switching and the nonlinear light propagation triggered at high power level, we demonstrate the superior performances of nonlinear power switching compared with traditional nonlinear directional couplers. Through the linear and nonlinear observation on AlGaAs waveguide array, we present the first experimental proof of the harmonic oscillations in optical waveguide arrays.

The analogy of optical system to other physical systems has been attracting much attention over the past decades. In coupled optical lattices, phenomena originated from electronic systems, such as Bloch oscillations, Dynamic localization and Zener tunneling, have been extensively investigated and led to novel research directions and applications. Following this idea, harmonic oscillations are spatially mimicked by the propagation of supermodes in quadratically-coupled waveguide arrays. By analyzing the field envelope with the propagation constants and the superposition of the supermodes, we achieve conjugate-imaging at the half-period plane and self-imaging at the full-period plane, which give rise to the linear switching. Combining the linear switching and the nonlinear light propagation triggered at high power level, we demonstrate the superior performances of nonlinear power switching compared with traditional nonlinear directional couplers. Through the linear and nonlinear observation on AlGaAs waveguide array, we present the first experimental proof of the harmonic oscillations in optical waveguide arrays.

Lam Wan. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references (p. 139-145). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

An Zhuo. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2002. / Includes bibliographical references (leaves 62-65). / Abstracts in English and Chinese. / Acknowledgments --- p.i / 摘要 --- p.ii / Abstract --- p.iii / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Circuit switching and Packet switching --- p.2 / Chapter 1.2 --- Virtual paths in high-speed networks --- p.6 / Chapter 1.3 --- BEF in cross-path switch --- p.8 / Chapter 1.4 --- Organization --- p.11 / Chapter Chapter 2 --- Analysis models --- p.12 / Chapter 2.1 --- Routing schemes in Clos network --- p.12 / Chapter 2.2 --- Path Switching --- p.15 / Chapter 2.3 --- Traffic Model of Input Modules --- p.17 / Chapter 2.4 --- Traffic Model of Output Modules --- p.19 / Chapter 2.5 --- Summary --- p.23 / Chapter Chapter 3 --- Throughput Performance of Input Modules in Path Switching --- p.24 / Chapter 3.1 --- Throughput performance vs. BEF --- p.24 / Chapter 3.2 --- Throughput performance vs. number of virtual paths --- p.30 / Chapter 3.2.1 --- Throughput performance vs. integer group size m/k --- p.33 / Chapter 3.2.2 --- Throughput performance vs. group size 0<R<2 --- p.39 / Chapter 3.2.3 --- Throughput performance vs. look-ahead scheme window size ω --- p.46 / Chapter 3.3 --- Summary --- p.48 / Chapter Chapter 4 --- Traffic Balancing Control in Path Switching --- p.50 / Chapter 4.1 --- Loss Probability in Output Modules --- p.50 / Chapter 4.1.1 --- Loss probability vs. number of central modules m --- p.51 / Chapter 4.1.2 --- Loss probability vs. knockout group size R and cluster size g --- p.52 / Chapter 4.2 --- Simulation Comparison of look-ahead scheme --- p.53 / Chapter 4.3 --- Simulation result of throughput vs. BEF --- p.55 / Chapter 4.4 --- Traffic Balancing Control --- p.55 / Chapter 4.5 --- Summary --- p.53 / Chapter Chapter 5 --- Conclusion --- p.60 / Bibliography --- p.62

by Chan Man Chi. / "June 2000." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (p. 150-[160]). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

Hui Li. / "May 2000." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (p. 135-144). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web.

by Zhu Jian. / "May 2002." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2002. / Includes bibliographical references (p. 162-170). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

Mui Sze Wai. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 62-65). / Abstracts in English and Chinese. / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Evolution of Multirate Networks --- p.2 / Chapter 1.2 --- Some Results from Previous Work --- p.2 / Chapter 1.3 --- Multirate Traffic on Benes Network --- p.5 / Chapter 1.4 --- Organization --- p.7 / Chapter 2. --- Background Knowledge on Benes Network and Path Switching --- p.8 / Chapter 2.1 --- Benes Network --- p.9 / Chapter 2.1.1 --- Construction of Large Switching Fabrics --- p.9 / Chapter 2.1.2 --- Routing in Benes Network --- p.11 / Chapter 2.1.3 --- Performance when Operated as a Large Switch Fabric --- p.13 / Chapter 2.2 --- Path Switching --- p.14 / Chapter 2.2.1 --- Basic Concept of Path Switching --- p.14 / Chapter 2.2.2 --- Capacity Allocation and Route Assignment --- p.15 / Chapter 3. --- Path Switching over Benes Network --- p.20 / Chapter 3.1 --- The Model of path-switched Benes Network --- p.21 / Chapter 3.2 --- Module-to-Module Implementation --- p.21 / Chapter 3.2.1 --- The First Stage (Input Module) --- p.22 / Chapter 3.2.2 --- The Middle Stage (Central Module) --- p.23 / Chapter 3.2.3 --- The Last Stage (Output Module) --- p.24 / Chapter 3.3 --- Port-to-Port Implementation --- p.24 / Chapter 3.3.1 --- Uniform Traffic --- p.25 / Chapter 3.3.2 --- Mult irate Traffic --- p.26 / Chapter 3.4 --- Closing remarks --- p.29 / Chapter 4. --- Performance Analysis --- p.31 / Chapter 4.1 --- Traffic Constraints and Perform- ance Guarantees --- p.32 / Chapter 4.1.1 --- Arrival Curve and Service Curve --- p.33 / Chapter 4.1.2 --- Delay Bound and Backlog Bound --- p.36 / Chapter 4.2 --- Service Guarantees --- p.39 / Chapter 4.3 --- Deterministic Bounds --- p.42 / Chapter 4.3.1 --- Delay --- p.42 / Chapter 4.3.2 --- Backlog at Input Module --- p.44 / Chapter 4.3.3 --- Backlog at Output Module --- p.47 / Chapter 5. --- Simulation Results --- p.52 / Chapter 5.1 --- Uniform Traffic --- p.53 / Chapter 5.2 --- Multirate Traffic --- p.55 / Chapter 6. --- Conclusions and Future Research --- p.59 / Chapter 6.1 --- Suggestions for future research --- p.61 / Bibliography --- p.62

by Man Wai-Hung. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 62-66). / Abstracts in English and Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- General Types of Switch Architecture --- p.2 / Chapter 1.1.1 --- Input-Buffered Switch --- p.2 / Chapter 1.1.2 --- Output-Buffered Switch --- p.4 / Chapter 1.1.3 --- Crossbar-Based Switch --- p.4 / Chapter 1.1.4 --- Shared Buffer Memory Switch --- p.5 / Chapter 1.2 --- From Clos Network to Cross-path Switch --- p.6 / Chapter 1.3 --- Motivation and Organization --- p.12 / Chapter 2 --- Route Reconfiguration in Clos Network --- p.14 / Chapter 2.1 --- Connection Matrix in Clos Network --- p.15 / Chapter 2.2 --- Rearranging Central Modules in Clos Network --- p.18 / Chapter 2.3 --- Changing the Connection Matrix --- p.20 / Chapter 2.4 --- One Step Route Reconfiguration --- p.21 / Chapter 2.5 --- Closing Remarks --- p.25 / Chapter 3. --- Frame-Based Reconfiguration Scheme in Cross-Path Switch --- p.26 / Chapter 3.1 --- Route Assignment in Cross-Path Switch --- p.27 / Chapter 3.1.1 --- Requirement Matrix and Capacity Matrix --- p.27 / Chapter 3.1.2 --- Allocation Vector --- p.29 / Chapter 3.2 --- Progress Tracing in Cross-Path Switch --- p.30 / Chapter 3.3 --- Implementing Frame-Based Reconfiguration --- p.32 / Chapter 3.3.1 --- Recognizing Receiver Virtual Path --- p.33 / Chapter 3.3.2 --- Finding Donor Virtual Path --- p.34 / Chapter 3.4 --- Simulation Results --- p.36 / Chapter 3.4.1 --- Fixed Requirement Matrix --- p.36 / Chapter 3.4.2 --- Time-Varying Requirement Matrix --- p.38 / Chapter 3.5 --- Unfavourable Reconfigurations --- p.39 / Chapter 3.6 --- Closing Remarks --- p.41 / Chapter 4. --- Performance and Delay Tradeoff in Frame-Based Reconfiguration Scheme --- p.43 / Chapter 4.1 --- Service Curve and Cross-Path Switch --- p.44 / Chapter 4.2 --- Service Curve of Cross-Path Switch under Reconfiguration --- p.45 / Chapter 4.3 --- Impact of Reconfiguration Algorithms to Maximum Delay Increase --- p.48 / Chapter 4.4 --- Numerical Example --- p.56 / Chapter 4.5 --- Closing Remarks --- p.57 / Chapter 5. --- Conclusions and Future Researches --- p.59 / Chapter 5.1 --- Suggestions for Future Researches --- p.60 / Bibliography --- p.62