We propose using low bandwidth coherent receivers for distributed optical performance monitoring. We demonstrate optical signal-to-noise ratio (OSNR) monitoring of both 20-Gb/s single-polarization and 40-Gb/s polarization-multiplexed coherent optical orthogonal frequency-division multiplexing (CO-OFDM) signals with a 0.8-GHz receiver using both data-aided (DA) and non-data-aided (NDA) approaches. The sampling rate of the performance monitor is much lower than the signal baud rate, so provides a cost-effective solution for distributed optical performance monitoring. The proposed method is demonstrated experimentally and through simulation. The results show that after calibration the OSNR monitoring error is less than 1 dB and the two approaches are not affected by fiber dispersion after 800-km transmission and 30-ps differential group delay (DGD).
© 2012 OSAFull Article | PDF Article
Ivan B. Djordjevic, Lei Xu, and Ting Wang
Opt. Express 16(14) 10269-10278 (2008)
Yannis Benlachtar, Giancarlo Gavioli, Vitaly Mikhailov, and Robert I. Killey
Opt. Express 16(20) 15477-15482 (2008)
Xi Chen, An Li, Guanjun Gao, and William Shieh
Opt. Express 19(27) 26198-26207 (2011)