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Optical Engineering

Impact of four-wave mixing on dispersion-managed frequency-shift-keying dense-wavelength-division-multiplexing system including various light-propagating effects
Author(s): Jianxin Du; Lihua Qian; Qiuyue Chen
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Paper Abstract

We describe a semi-analytic model used to deterministically and exactly calculate the variance of degenerate and nondegenerate four-wave mixing (FWM) noises for 128×10  Gb/s return-to-zero frequency-shift-keying dispersion-managed dense-wavelength-division-multiplexing system. The analytic model includes various important light-propagating effects such as walk-off between channels, oscillation of pulse width with transmission distance, and stochastic variation of birefringence strength and orientation along fiber. The achievable maximum Q-factor and allowed maximum input powers for different dispersion management schemes and transmission distances are shown including overall FWM noises from different channel combinations, signal-amplified spontaneous emission (ASE) beat noise, and others. Achievable maximum transmission distances for such systems are studied. The upper limit of local dispersion of the dispersion map is discussed. In the case of allowed maximum input powers for the system, the variances of overall FWM noise are observed to be about half of those of signal-ASE beat noise when averaged for different transmission distances. It is found that for high-local dispersion, when transmission distance is long enough, effect of nondegenerate FWM noise, compared with degenerate FWM noise, can be ignored.

Paper Details

Date Published: 18 November 2013
PDF: 9 pages
Opt. Eng. 52(11) 116108 doi: 10.1117/1.OE.52.11.116108
Published in: Optical Engineering Volume 52, Issue 11
Show Author Affiliations
Jianxin Du, Nanjing Univ. of Posts and Telecommunications (China)
Lihua Qian, Nanjing Univ. of Posts and Telecommunications (China)
Qiuyue Chen, Nanjing Univ. of Posts and Telecommunications (China)

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