Abstract:
Random polarization rotations caused by residual fiber birefringence is an important physical effect in optical coherent systems employing polarization-division multiplex...Show MoreMetadata
Abstract:
Random polarization rotations caused by residual fiber birefringence is an important physical effect in optical coherent systems employing polarization-division multiplexing. The specificity of the large penalties induced by polarization-related impairments make polarization-dedicated equalization subsystems mandatory for the design of flexible coherent receivers. It has recently been shown that 3-dimensional Stokes space based approaches can improve polarization demultiplexing and polarization dependent losses compensation task in coherent receivers, particularly in terms of convergence speed and transparency to higher-level M-ary signals. This paper reports recent advances on Stokes space based digital signal processing for coherent optical communications. The performance versus computation efforts of different methods used to compute a symmetry plane in the Stokes space, e.g. the geometric approach and Kalman filtering, is assessed for both polarization-dependent losses compensation and PolDemux subsystems. The applicability and robustness of the adaptive Stokes algorithm are tested in a scenario based on an ultra-dense WDM access network. Experimental results demonstrate the suitableness of Stokes PolDemux solution for metro and access networks with flexible transceivers based on higher-level M-ary signals.
Date of Conference: 10-14 July 2016
Date Added to IEEE Xplore: 25 August 2016
ISBN Information:
Electronic ISSN: 2161-2064