Adaptive controller polarization mode dispersion compensator

In this paper we show how to adjust a standard first-order compensator, consisting of an adaptive polarization controller, describe a method for single-order PMD compensation, whereby an adaptive polarization controller mitigates 1st-order DGD. With this scheme we compensate the differential group delay (DGD), study how to reduce the frequency dependent rotation of the output state of polarization (OSOP), and how to jointly reduce second-order DGD treated by Dynamic AWG chirp. We also fabricated a new optical PMD compensator on a lightwave circuit, where an Adaptive feedback loop polarization controller and a polarization-dependent delay line are installed. We confirmed its operational principle in a 40-Gbps-transmission system.