Answers are grounded in this paper and cite their sources.
Based on different coherence properties of signal and noise, we measured the in-band optical signal-to-noise ratio using an integrated thermally tunable Mach-Zehnder optical delay interferometer on SOI platform. The experimental results exhibit errors smaller than 1 dB for signals with bit rate <40 Gbps over an OSNR range of 9~30 dB. The effects of the extinction ratio, noise equivalent bandwidth and arm length difference on the implementation of measurement are analyzed.
No takes yet. Share an insight, caveat, or question.
Jia et al. (2012) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: