Open AccessPerformance degradation in coherent polarization multiplexed systems as a result of polarization dependent loss
Author(s) -
Mark Shtaif
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.013918
Subject(s) - polarization (electrochemistry) , multiplexing , optics , polarization division multiplexing , physics , polarization mode dispersion , signal processing , limiting , polarization rotator , computer science , wavelength division multiplexing , telecommunications , wavelength , optical fiber , engineering , birefringence , mechanical engineering , radar , chemistry
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.