Optical performance monitoring based on asynchronous delay-tap sampling

Abstract

The asynchronous delay-tap sampling technique is a promising in-service monitoring technique capable of measuring simultaneous impairments for multiple bit rates and formats. The two core components of the technique are the characterization of the signal with an asynchronously sampled phase portrait and the extraction of impairment features using statistical machine learning techniques. A major advantage of the technique is that a direct detection-based receiver with set bandwidths can be used for multiple formats and bit rates. Early proof-of-principle demonstrations, based on single transponder- and laboratory-generated impairments, have been further validated at 10-Gb/s with WDM system me..