Endless Optical Polarization Control at 56 krad/s, Over 50 Gigaradian, and Demultiplex of 112-Gb/s PDM-RZ-DQPSK Signals at 3.5 krad/s
B. Koch, V. Mirvoda, H. Grießer, H. Wernz, D. Sandel, R. Noé, IEEE Journal of Selected Topics in Quantum Electronics 16 (2010) 1158–1163.