Patent ID: 11942695
Assignee: PHASE SENSITIVE INNOVATIONS, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 31:
32. A method for controlling phase in a plurality of optical signal channels, the method comprising:
generating a reference signal and a carrier signal, the reference signal and carrier signal being optical signals having the same phase and frequency;
using the carrier signal to generate a plurality of optical input signals, the plurality of optical input signals including a first group of optical input signals and a second group of optical input signals;
for each particular optical input signal of the plurality of optical input signals, using the particular optical input signal and a modulated reference signal generated using the reference signal to generate a respective interference signal, thereby generating a plurality of interference signals including a first group of interference signals and a second group of interference signals;
converting the plurality of interference signals to digital signals to generate a plurality of digital signals including a first group of digital signals and a second group of digital signals;
inputting the first group of digital signals to a first digital processor, and simultaneously inputting the second group of digital signals to a second digital processor;
transmitting, by the first digital processor, a first group of adjustment signals respectively corresponding to the first group of optical input signals, and transmitting, by the second digital processor, a second group of adjustment signals respectively corresponding to the second group of optical input signals; and
adjusting the phase of at least one optical input signal of the first group of optical input signals based on the first group of adjustment signals, and adjusting the phase of at least one optical input signal of the second group of optical input signals based on the second group of adjustment signals.