Abstract: A polarization-multiplexed self-homodyne analog coherent (PM-SH-ACD) architecture for optical communication links has a receiver section that polarization un-rotates a signal from a fiber optic cable into first and second polarized optical signals; recovers a polarization of the first and second optical signals based on a received polarization recovery signal that is based on a pilot signal measurement signal; demodulates the first optical signal into optical QPSK data and pilot tone signals; demodulates the second optical signal into an optical modulating laser light; splits the first and second optical signals into optical QPSK quadrature signals; converts the optical QPSK quadrature signals into electrical QPSK quadrature signals; detects a polarization of the pilot tone signal and outputs the pilot signal measurement signal polarization recovery signal based on the detected polarization.
Type:
Grant
Filed:
April 26, 2023
Date of Patent:
November 7, 2023
Assignee:
Lucidean, Inc.
Inventors:
Aaron Maharry, Hector Adolfo Andrade Paez, Clint Lee Schow, Larry Allen Coldren, James Franklin Buckwalter