Optimal amplitude ratios and chromatic dispersion tolerances of optical quaternary ASK-DPSK and 8-ary ASK-DQPSK

Michael Ohm; Joachim Speidel

doi:10.1117/12.576820

11 February 2005 Optimal amplitude ratios and chromatic dispersion tolerances of optical quaternary ASK-DPSK and 8-ary ASK-DQPSK

Michael Ohm, Joachim Speidel

Author Affiliations +

Proceedings Volume 5625, Optical Transmission, Switching, and Subsystems II; (2005) https://doi.org/10.1117/12.576820
Event: Asia-Pacific Optical Communications, 2004, Beijing, China

Abstract

In this paper we investigate quaternary combined amplitude- and differential binary phase-shift keying (ASK-DPSK) and 8-ary combined amplitude- and differential quadrature phase-shift keying (ASK-DQPSK) at a bit rate of 40Gbit/s. For both formats, optimal values for amplitude ratios of the signal points and electrical and optical receiver bandwidths are given. Required optical signal-to-noise ratios (OSNR) at the receivers for bit error probabilities of 10^(-9) and chromatic dispersion tolerances are compared to amplitude-shift keying (ASK), binary differential phase-shift keying (DPSK) and quadrature phase-shift keying (DQPSK). For our numerical investigations we use a semi-analytical method for bit error probability computations.

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Michael Ohm and Joachim Speidel "Optimal amplitude ratios and chromatic dispersion tolerances of optical quaternary ASK-DPSK and 8-ary ASK-DQPSK", Proc. SPIE 5625, Optical Transmission, Switching, and Subsystems II, (11 February 2005); https://doi.org/10.1117/12.576820

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