Patent ID: 9716564
Date: 2017-07-25
CPC Classifications: H04B,H04J

Claim:
1. An optical receiver, comprising: a local oscillator including a laser that supplies a reference optical signal; a hybrid mixer that receives a polarization multiplexed signal carrying a set of tones and the reference optical signal, the hybrid mixer supplying a plurality of optical components; a plurality of photodiodes that receive the plurality of optical components and outputs a plurality of voltage signals; an analog-digital-converter (ADC) that receives the plurality of voltage signals; a digital signal processor (DSP) configured to: receive signals from the ADC indicative of information representing the polarization multiplexed signal, the information representing the polarization multiplexed signal including first information associated with a first data rate, and second information associated with a second data rate different than the first data rate, the second information being tone information representing the set of tones the set of tones being associated with performing carrier recovery for the polarization multiplexed signal, the set of tones constituting a plurality of symbols, and the polarization multiplexed signal having an uncorrected state of polarization (SOP); determine sets of Stokes parameters based on the tone information, a set of Stokes parameters, of the sets of Stokes parameters, including information indicative of the SOP of the polarization multiplexed signal; determine a set of polarization parameters based on the sets of Stokes parameters; and apply, based on the set of polarization parameters, a set of operations to the information representing the polarization multiplexed signal, an operation, of the set of operations, representing a rotation or a phase retardation of the polarization multiplexed signal and corresponding to a polarization parameter of the set of polarization parameters, and the set of operations being applied to the information representing the polarization multiplexed signal in order to generate corrected information, the corrected information including information representing the polarization multiplexed signal with a corrected SOP.