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A self-coherent receiver for detection of PolMUX coherent signals

 
: Li, J.S.; Schmogrow, R.; Hillerkuss, D.; Schindler, P.C.; Nazarathy, M.; Schmidt-Langhorst, C.; Ezra, S.B.; Tselniker, I.; Koos, C.; Freude, W.; Leuthold, J.

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Postprint (PDF; )

Optics Express 20 (2012), Nr.19, S.21413-21433
ISSN: 1094-4087
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer HHI ()

Abstract
A self-coherent receiver capable of demultiplexing PolMUX-signals without an external polarization controller is presented. Training sequences are introduced to estimate the polarization rotation, and a decision feedback recursive algorithm mitigates the random walk of the recovered field. The concept is tested for a PolMUX-DQPSK modulation format where one polarization carries a normal DQPSK signal while the other polarization is encoded as a progressive phase-shift DQPSK signal. An experimental demonstration of the scheme for a 112 Gbit/s PolMUX-DQPSK signal is presented.

: http://publica.fraunhofer.de/dokumente/N-217008.html