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Monitoring of OSNR by using a Mach–Zehnder interferometer
Author(s) -
Tao Zhenning,
Chen Zhangyuan,
Fu Libin,
Wu Deming,
Xu Anshi
Publication year - 2001
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.1221
Subject(s) - interferometry , mach–zehnder interferometer , crosstalk , dynamic range , optics , physics , bit error rate , microwave , polarization (electrochemistry) , electronic engineering , computer science , telecommunications , engineering , chemistry , channel (broadcasting)
We introduce a novel technique to monitor the optical signal‐to‐noise ratio (OSNR) using a Mach–Zehnder interferometer. The error of the novel method is less than 0.5 dB when the OSNR is between 10 and 40 dB in the best working case. In practice, the dynamic range reduces to 10–30 dB because of the influence of polarization, crosstalk, and signal bit rate. The key advantage of this method is its low cost. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 63–65, 2001.