An adaptive phase equalizer for reducing timing jitter due to acoustic effect

The main source of errors for solitons when propagating in optical fibers is the timing jitter. The acoustic effect, unlike other sources of timing jitter such as the Gordon-Haus effect and the polarization effect that are stochastic in nature, is deterministic and is a source of intersymbol interference (ISI). We introduce an adaptive phase equalizer to compensate for the acoustically induced timing jitter (AITJ). We show that the equalizer can be trained in a “semi-blind” fashion by controlling the probability of “1”s in the transmitted sequence and can successfully decrease the AITJ. We demonstrate application of the scheme by simulations and discuss implementation issues