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Proceedings Paper

Four-wave mixing degradation compensation with digital coherent detection in optical amplifier repeater system
Author(s): Nishiuchi Kazuhumi; Liang Jing; Iwashita Katsushi
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Paper Abstract

Further increase of transmission capacity is required for high speed networks and there are some problems to improve WDM system performances. Especially, for-wave-mixing (FWM) is one of the fiber nonlinearities and FWM impairments remain unsolved. In this experiment, we demonstrate digital coherent detection for FWM compensation. Two ASK-modulated optical signals are transmitted through dispersion-shifted fibers (DSF) with an optical amplifier repeater. FWM has been generated by transmitting through DSF. The transmitted signals are combined with phase-locked local oscillator lights because phase information and the phase relation among individual channels can be kept using phase locked light. The detected individual signals are compensated by backward propagation method. The FWM-crosstalk ratio is improved from 12 dB to 17dB and eye-opening is also improved by compensation.

Paper Details

Date Published: 18 February 2011
PDF: 6 pages
Proc. SPIE 7988, Optical Transmission Systems, Switching, and Subsystems VIII, 798829 (18 February 2011); doi: 10.1117/12.888622
Show Author Affiliations
Nishiuchi Kazuhumi, Kochi Univ. of Technology (Japan)
Liang Jing, Kochi Univ. of Technology (Japan)
Iwashita Katsushi, Kochi Univ. of Technology (Japan)

Published in SPIE Proceedings Vol. 7988:
Optical Transmission Systems, Switching, and Subsystems VIII
Yikai Su; Ernesto Ciaramella; Xiang Liu; Naoya Wada, Editor(s)

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