Performance degradation in coherent polarization multiplexed systems as a result of polarization dependent loss.

The ultimate limits introduced by polarization dependent loss (PDL) in coherent polarization multiplexed systems using advanced signal processing are studied. An analytical framework for effectively assessing the penalties is established and applied to systems with and without dynamically optimized launch polarization control. In systems with no launch polarization control, the PDL induced penalty is described by a simple formula and it is independent of the choice of constellation, or modulation format. The gain from optimizing launch polarizations is studied numerically and the mechanisms limiting it are described.

[1]  N. Gisin,et al.  Polarization-induced distortions in optical fiber networks with polarization-mode dispersion and polarization-dependent losses , 2000, IEEE Journal of Selected Topics in Quantum Electronics.

[2]  H. Kogelnik,et al.  PMD fundamentals: polarization mode dispersion in optical fibers. , 2000, Proceedings of the National Academy of Sciences of the United States of America.

[3]  A. Mecozzi,et al.  The statistics of polarization-dependent loss in optical communication systems , 2002, IEEE Photonics Technology Letters.

[4]  M. Shtaif,et al.  Signal-to-noise-ratio degradation caused by polarization-dependent loss and the effect of dynamic gain equalization , 2004, Journal of Lightwave Technology.

[5]  M. Shtaif,et al.  Polarization-dependent loss and its effect on the signal-to-noise ratio in fiber-optic systems , 2004, IEEE Photonics Technology Letters.

[6]  L. Palmieri,et al.  Spatially resolved PMD measurements , 2004, Journal of Lightwave Technology.

[7]  J. Zweck,et al.  A receiver model for optical fiber communication systems with arbitrarily polarized noise , 2005, Journal of Lightwave Technology.

[8]  M. O'Sullivan,et al.  WDM Performance and PMD Tolerance of a Coherent 40-Gbit/s Dual-Polarization QPSK Transceiver , 2008, Journal of Lightwave Technology.

[9]  S. Bigo,et al.  Linear Fiber Impairments Mitigation of 40-Gbit/s Polarization-Multiplexed QPSK by Digital Processing in a Coherent Receiver , 2008, Journal of Lightwave Technology.

[10]  David Hanson,et al.  Performance of a 46-Gbps Dual-Polarization QPSK Transceiver in a High-PMD Fiber Transmission Experiment , 2008 .

[11]  Kuang-Tsan Wu,et al.  Real-time measurements of a 40 Gb/s coherent system. , 2008, Optics express.