Improving optical spectral monitoring with signal processing
Li M., Pendock GJ., Evans RJ.
We experimentally demonstrate the use of regularization techniques to enhance the resolution of an optical channel monitor based on a broad bandwidth Fabry-Perot filter (FPF). This enables us to measure OSNR to within 0.5 dB on 50 GHz spaced 10 Gb/s channels when using a 35 GHz scanning filter.