Tunable polarization maintaining fiber Bragg grating based OSNR monitor
A simple optical performance monitoring scheme based on a tunable polarization maintaining fiber Bragg grating is proposed. The proposed technique measures the in-band optical signal-to-noise-ratio through orthogonal polarization detection. The scheme is successfully demonstrated for NRZ-OOK signals at 10Gb/s with an input dynamic range of around 20dB. The results show that the performance of the scheme is not sensitive to the effects of chromatic dispersion.
optical performance monitor optical signal-to-noise-ratio (osnr) wavelength-division-multiplexing (wdm)