We proposed an adaptive PMD compensation scheme based on FPGA using DPSO algorithm. Stable polarization
compensation for 43Gbit/s RZ-DQPSK transmission over 1200km was demonstrated with endless polarization
scrambling. Excellent performance was accomplished utilizing our scheme in case of changing SOP and DGD in longhaul
fibre link.
This paper reports the prototype of optical polarization mode dispersion compensator (OPMDC) we have made to
compensate the polarization mode dispersion (PMD) in fibers. The OPMDC prototype designed was tested in a 43Gb/s
RZ-DQPSK system either in the back-to-back case, or in a 1200km transmission testbed. It showed a good performance
under the tests of fast SOP and PSP rotation, DGD variation, and moderate knock on the testbed in a period of 12 hours.
We report an experiment of de-multiplexing automatically in a polarization division multiplexing system using a DSP
based de-multiplexer. The searching algorithm was a modified Particle Swarm Optimization. We successfully
demonstrated the de-multiplexing scheme both in a 2x10-Gb/s PolMux-NRZ-OOK system and a 40-Gb/s PolMux-RZ-DQPSK
system.
KEYWORDS: Polarization, Digital signal processing, Control systems, Feedback signals, Signal processing, Photonics, Polarimetry, Digital Light Processing, Telecommunications, Data conversion
A Polarization measurement using DSP-based control system has been demonstrated in the experiment. The normalized
Stokes parameters and the degree of polarization which are varying at the speed of in the order of millisecond are measured
in real-time manner.
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