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I ACKNOWLEDGEMENT  III TABLE OF CONTENTS  IV LIST OF FIGURES  IX LIST OF TABLES  XVII LIST OF SYMBOLS  XVIII LIST OF ABBREVIATIONS  XIX CHAPTER 1: INTRODUCTION  1 1.1. BACKGROUND  2 1.2. MOTIVATION  2 1.2.1. Wavelength Selective switches (WSS) and wavelength filters in Wavelength Division Multiplexed(WDM) optical network  4 1.3. OBJECTIVES  8 1.4. SCOPE  9 1.5. RESEARCH ROADMAP  10 1.6. ORGANIZATION OF THE THESIS  10 CHAPTER 2: LITERATURE REVIEW 13 2.1. WAVELENGTH SELECTIVE SWITCHING TECHNOLOGIES IN AN OPTICAL COMMUNICATION NETWORK  14 2.2. MICRO RING RESONATORS  20 2.3. THERMO-OPTIC (TO) ACTIVE DEVICES USING MICRO RING RESONATORS 23

Investigations into the design and fabrication of silicon photonic broadband wavelength selective switches and filters