Abstract

We propose and experimentally demonstrate an optical signal-to-noise ratio (OSNR) monitoring technique for an 80Gbitss polarization-multiplexed return-to-zero differential phase-shift keying channel utilizing a narrowband optical filter and a low-speed detector. A maximum power increment of 19.7dB is measured at a radio frequency (rf) of 250MHz for monitoring of OSNR up to 27dB, insensitive to chromatic dispersion of 0300psnm and polarization-mode dispersion (PMD) of 050ps.

© 2009 Optical Society of America

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