Optical Switching

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A Seminar Report on

OPTICAL SWITCHING
Prepared by

JERY EAPEN B070255EC B.Tech (Electronics and Communication Engineering)

Department of Electronics and communication Engineering NATIONAL INISTITUTE OF TECHNOLOGY CALICUT Kozhikode, Kerala- 673601, India Monsoon 2010

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Department of Electronics and communication Engineering
NATIONAL INISTITUTE OF TECHNOLOGY CALICUT

CERTIFICATE
This is to certify that this seminar report entitled “Optical Switching” is a bonafide record of the seminar presented By Mr Jery Eapen, Roll No.B070255EC, During Monsoon 2010 in partial Fulfillment of the requirement of award of B.Tech degree in Electronics and Communication Engineering by the National Institute of Technology Calicut, India.

Dr Lillykutty Jacob Faculty In-Charge of Seminar Department of Electronics and Communication Engineering N.I.T Calicut

Date:

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TABLE OF CONTENTS
ABSTRACT ............................................................................................................................... 5 1. INTRODUCTION ................................................................................................................. 6 2. OPTICAL SWITCHES .......................................................................................................... 7 3. PARAMETERS OF AN OPTICAL SWITCH ...................................................................... 8 3.1 Insertion loss: ................................................................................................................... 8 3.2 Crosstalk: ......................................................................................................................... 8 3.3 Extinction ratio: ............................................................................................................... 8 3.4 Polarization-dependent loss (PDL): ................................................................................. 8 3.5 Other parameters: ............................................................................................................. 8 4. DIFFERENT TYPES OF OPTICAL SWITCHES ................................................................ 9 4.1 OPTOMECHANICAL SWITCH .................................................................................... 9 4.2 MEMS .............................................................................................................................. 9 4.2.1 Working .................................................................................................................. 10 4.2.2 Advantages .............................................................................................................. 10 4.3 THERMO-OPTIC SWITCH ......................................................................................... 12 4.3.1 Working .................................................................................................................. 12 4.3.2 Advantages .............................................................................................................. 12 4.4 BUBBLE SWITCH ....................................................................................................... 13 4.5 LIQUID CRYSTAL SWITCH ...................................................................................... 14 4.5.1 Working .................................................................................................................. 15 4.6 ELECTRO-OPTIC SWITCH ........................................................................................ 16 4.7 ACOUSTO-OPTIC SWITCH ....................................................................................... 16 4.8 NON-LINEAR OPTICAL SWITCH ............................................................................. 17 5. Comparison of Optical Switching Technologies ................................................................. 20 6. CONCLUSION...
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