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Proceedings Paper

Research on the algorithm of OSNR in the OPM
Author(s): Jun He; Xiaohu Cheng; Qianggao Hu
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Paper Abstract

A method for calculating the optical-signal-to-noise ratio (OSNR) of an optical performance monitor (OPM) is discussed. OSNR is one of the most import parameters determining DWDM system performance because of its dominance in determining the bit-error-rate (BER). However for the optical and electric components’ limitations, most OPMs are less accurate and dynamic range in measuring OSNR. In order to improve OSNR, heightening measuring accuracy of the signal power and the noise power are both required. The method for improving accuracy of measuring the signal power, namely Gauss Fitting, can heighten the signal power in the selected bandwidth by 1-2 dB. For improving accuracy of measuring the noise power, a kind of algorithm about deconvolution and signal recovery is discussed, which is used to sharpen the signal figure and eliminate effect of signal power to noise power (named cross talk). After deconvolution, the power of the pits of a 100 GHz channel signal can be depressed by 6-8 dB. In conclusion, a research on how to calculate OSNR in the OPM is discussed. By Gauss Fitting and deconvolution, the signal can be recovery efficiently and the result of OSNR can be heightened by 7-10 dB.

Paper Details

Date Published: 7 May 2004
PDF: 7 pages
Proc. SPIE 5281, Optical Transmission, Switching, and Subsystems, (7 May 2004); doi: 10.1117/12.523028
Show Author Affiliations
Jun He, Accelink Technologies Co., Ltd. (China)
Wuhan Research Institute of Posts and Communications (China)
Xiaohu Cheng, Accelink Technologies Co., Ltd. (China)
Wuhan Research Institute of Posts and Communications (China)
Qianggao Hu, Accelink Technologies Co., Ltd. (China)
Wuhan Research Institute of Posts and Communications (China)


Published in SPIE Proceedings Vol. 5281:
Optical Transmission, Switching, and Subsystems
Cedric F. Lam; Chongcheng Fan; Norbert Hanik; Kimio Oguchi, Editor(s)

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