Novel type of PMD compensator based on separation of PSP and DGD controls

We propose and experimentally demonstrate a novel type of PMD (polarization mode dispersion) compensator (PMDC) that separates PSP (principal states of polarization) control from DGD (differential group delay) control with an automatically adaptive 40 Gb/s PMDC module manufactured on PCBs. The results showed that this method provided a very fast response time of /spl sim/2 /spl mu/s to PSP change and allowed a reduction in compensation time compared with the conventional method of alternately controlling PSP and DGD.