Advanced Photonics 2013
DOI: 10.1364/iprsn.2013.iw5a.2
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We demonstrate high-sensitivity in-band OSNR monitoring on a SOI platform. The integrated system, including a ring resonator and an unbalanced Mach-Zehnder interferometer, enables OSNR measurements from 8 dB to 28 dB with 0.3 dB accuracy.