NON COHERENT EXPERIMENTAL IN-BAND OSNR MONITORING USING COST-EFFECTIVE DSP TECHNIQUE INSENSITIVE TO POLARIZATION EFFECTS
Keywords:DSP, Monitoring, OSNR, Photodetection, Polarization
We develop and demonstrate an experimental cost-effective solution for non-coherent single polarization channel in-band OSNR estimation, using a digital signal processing (DSP) technique, insensitive to effects of different states of polarization. It was verified that previous reported methods when applied in a real optical network scenario (without polarization control), provides an OSNR error estimation above 8Â dB when different states of polarization are considered. We analyzed, modeled and implemented this influence through numerical simulations and applied to the experimental device, resulting in a successfully OSNR estimation from 5.5 to 17Â dB (range of 11.5Â dB) with error below 2Â dB for OOK modulated channels.
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