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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 6 — Mar. 24, 2014
  • pp: 6620–6633

Moment-generating function method used to accurately evaluate the impact of the linearized optical noise amplified by EDFAs

Zhongxi Zhang, Liang Chen, and Xiaoyi Bao  »View Author Affiliations

Optics Express, Vol. 22, Issue 6, pp. 6620-6633 (2014)

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In a nonlinear optical fiber communication (OFC) system with signal power much stronger than noise power, the noise field in the fiber can be described by linearized noise equation (LNE). In this case, the noise impact on the system performance can be evaluated by moment-generating function (MGF) method. Many published MGF calculations were based on the LNE using continuous wave (CW) approximation, where the modulated signal needs to be artificially simplified as an unmodulated signal. Results thus obtained should be treated carefully. Reliable results can be obtained by replacing the CW-based LNE with the accurate LNE proposed by Holzlöhner et al in Ref. [1]. In this work we show that, for the case of linearized noise amplified by EDFAs, its MGF can be obtained by calculating the noise propagator directly from the accurate LNE. Our results agree well with the experimental data of multi-span DPSK systems.

© 2014 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.5060) Fiber optics and optical communications : Phase modulation
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes

ToC Category:
Optical Communications

Original Manuscript: November 20, 2012
Manuscript Accepted: February 27, 2014
Published: March 14, 2014

Zhongxi Zhang, Liang Chen, and Xiaoyi Bao, "Moment-generating function method used to accurately evaluate the impact of the linearized optical noise amplified by EDFAs," Opt. Express 22, 6620-6633 (2014)

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