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Optical differential phase modulation : system modeling and performance

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Optical differential phase modulation : system modeling and performance

Wang, Lei (2004) Optical differential phase modulation : system modeling and performance. Masters thesis, Concordia University.

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Abstract

We investigated high speed optical fiber communication systems using optical s-DPSK, s/2-DPSK, DQPSK and Offset-DQPSK modulation techniques, focusing on the system modeling and comparison of performance. The electronic precoder of optical s/2-DPSK was yet unknown, and its logic and basic circuit are presented in this thesis. We also compared the system performance with the impact of inter symbol interference (ISI) caused by fiber nonlinear effect, narrowband inline optical filtering and residual chromatic dispersion. It is shown that DQPSK has the narrowest signal bandwidth among four phase modulation schemes; Offset-DQPSK has two main lobes in its optical spectrum; Offset-DQPSK has the best tolerance to ISI induced by fiber nonlinear effect; s-DPSK has the best tolerance to optical filtering; and DQPSK has the best tolerance to residual chromatic dispersion. s-DPSK has better tolerance to residual chromatic dispersion than s/2-DPSK. All of these works were verified on Optism, a commercial optical simulation software platform

Divisions:Concordia University > Faculty of Engineering and Computer Science > Electrical and Computer Engineering
Item Type:Thesis (Masters)
Authors:Wang, Lei
Pagination:ix, 80 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Electrical and Computer Engineering
Date:2004
Thesis Supervisor(s):Zhang, John Xiupu
ID Code:8351
Deposited By:Concordia University Libraries
Deposited On:18 Aug 2011 14:22
Last Modified:18 Aug 2011 14:23
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