Optical performance monitoring in fiber transmission systems based on electrical sampling technique

Optical performance monitoring (OPM) can offer great assistances for intelligent system management of future smart optical networks. Since different optical impairments induce received electrical signal waveform distortion in different forms and degrees, analysis on electrical waveform distortion is an alternative way to monitor optical impairment by using electrical sampling technique, which takes the advantage of simple operation and minimum maintenance requirement. 2-dimensional (2D) phase portrait is efficient carrier to deliver the waveform information, which is used for monitoring parameter derivation. In this paper, we will review our sampling techniques to generate 2D phase portrait and its application on CD and OSNR monitoring.