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Record 59-krad/s Polarization Tracking in 112-Gb/s 640-km PDM-RZ-DQPSK Transmission

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6 Author(s)
Benjamin Koch ; University of Paderborn, Paderborn, Germany ; Reinhold Noe ; Vitali Mirvoda ; Helmut Griesser
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We present results obtained with a fast optical polarization controller. Tracking errors were <; 0.208 rad on the Poincaré sphere during 282 hours of endless polarization scrambling at up to 60 krad/s speed. Fifty-kilorad/second polarization changes were tracked at wavelengths between 1513 nm and 1600 nm. With this subsystem we optically demultiplexed the two polarizations of a 112-Gb/s PDM-RZ-DQPSK signal transmitted over 640 km of fiber at 59 krad/s. This is the fastest polarization control reported for this or higher bitrate and direct detection.

Published in:

IEEE Photonics Technology Letters  (Volume:22 ,  Issue: 19 )