MITIGATION OF POLARIZATION DEPENDENT LOSS IN OPTICAL MULTI-CARRIER/SUPER-CHANNEL TRANSMISSION

摘要

Methods and systems for mitigating effects of polarization dependent loss (PDL) in an optical network transmitting a multi-carrier optical signal comprising a plurality of subcarriers may involve assigning and modifying a state of polarization to each subcarrier prior to transmission. An assigned state of polarization for each subcarrier may be modified for the subcarrier in the digital domain and/or the optical domain. Various specific assignment methods may be used, including individual subcarrier assignment, subcarrier set assignment, arbitrary subcarrier group assignment, random assignment, and/or combinations thereof. The assigned states of polarization may be selected based on a resulting minimum PDL-induced peak-to-peak power variation over a sum of the subcarriers for all orientations of a principal axis of PDL.

主权项

1. A method for reducing effects of polarization dependent loss (PDL) in an optical network, comprising:
identifying a plurality of subcarriers associated with a multi-carrier optical signal; determining a plurality of states of polarization (SOPs) respectively corresponding to the plurality of subcarriers; and prior to transmission of the multi-carrier optical signal, modifying actual states of polarization of the plurality of subcarriers to respectively correspond to the determined plurality of states of polarization, wherein the plurality of states of polarization have dual polarization components.