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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 23, Iss. 3 — Mar. 1, 2005
  • pp: 1137–

New Techniques for the Suppression of the Four-Wave Mixing-Induced Distortion in Nonzero Dispersion Fiber WDM Systems

I. Neokosmidis, T. Kamalakis, A. Chipouras, and T. Sphicopoulos

Journal of Lightwave Technology, Vol. 23, Issue 3, pp. 1137- (2005)


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Abstract

The performance of a wavelength-division multiplexing (WDM) optical network can be severely degraded due to fiber nonlinear effects. In the case where nonzero dispersion (NZD) fibers are employed, the four-wave mixing (FWM) effect sets an upper limit on the input power, especially in the case of narrow channel spacing. In order to reduce FWM-induced distortion two new techniques,the hybrid amplitude-/frequency-shift keying (ASK/FSK) modulation and the use of prechirped pulses are investigated. It is shown that both techniques can greatly improve the Q-factor in a 10 Gb/s WDM system. This happens even for very high input powers (~ 10 dBm), where the degradation of the conventional WDM system is prohibitively high. The proposed methods are also applied and tested in higher bit rates (40 Gb/s). It is deduced that although the hybrid ASK/FSK modulation technique marginally improves the system performance, the optical prechirp technique can still be used to greatly increase the maximum allowable input power of the system.

© 2005 IEEE

Citation
I. Neokosmidis, T. Kamalakis, A. Chipouras, and T. Sphicopoulos, "New Techniques for the Suppression of the Four-Wave Mixing-Induced Distortion in Nonzero Dispersion Fiber WDM Systems," J. Lightwave Technol. 23, 1137- (2005)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-23-3-1137

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