Integrated Optical Equalizer Using Opto-Electronic Least Mean Square Algorithm for Chromatic and Polarization Mode Dispersion Compensation

We propose a parallel-structured optical equalizer utilizing an integrated vector modulator device. To jointly compensate chromatic and polarization mode dispersion, a new class of adaptation algorithms, the opto-electronic least mean squares (OE-LMS) algorithm, is introduced to optimize the electronic error signal, being fully compatible with electronic equalizers. Extensive Monte Carlo simulation demonstrates that this novel algorithm can effectively compensate GVD and PMD jointly. For 10 GBps NRZ, a 9-tap equalizer can compensate 6400 ps/nm GVD along with PMD, resulting in an OSNR penalty of less than 3dB. Furthermore, the OE-LMS can provide the same excellent tracking capability as offered by the LMS.