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Proceedings Paper

Optimal amplitude ratios and chromatic dispersion tolerances of optical quaternary ASK-DPSK and 8-ary ASK-DQPSK
Author(s): Michael Ohm; Joachim Speidel
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Paper 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.

Paper Details

Date Published: 11 February 2005
PDF: 11 pages
Proc. SPIE 5625, Optical Transmission, Switching, and Subsystems II, (11 February 2005); doi: 10.1117/12.576820
Show Author Affiliations
Michael Ohm, Univ. of Stuttgart (Germany)
Joachim Speidel, Univ. of Stuttgart (Germany)

Published in SPIE Proceedings Vol. 5625:
Optical Transmission, Switching, and Subsystems II
Cedric F. Lam; Wanyi Gu; Norbert Hanik; Kimio Oguchi, Editor(s)

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