Search International and National Patent Collections

1. (WO2018009731) SPATIALLY DEPHASING LOCAL OSCILLATOR FOR COHERENT FREE-SPACE OPTICAL COMMUNICATIONS

Pub. No.:    WO/2018/009731    International Application No.:    PCT/US2017/040996
Publication Date: Fri Jan 12 00:59:59 CET 2018 International Filing Date: Sat Jul 08 01:59:59 CEST 2017
IPC: H01S 3/00
H01S 3/067
H01S 3/10
H01S 3/23
Applicants: LOCKHEED MARTIN CORPORATION
Inventors: BOCK, Kevin Richard
PERKINS, Patrick Elliott
TISCHHAUSER, Christopher William
Title: SPATIALLY DEPHASING LOCAL OSCILLATOR FOR COHERENT FREE-SPACE OPTICAL COMMUNICATIONS
Abstract:
A coherent transceiver system includes a local oscillator (LO) light source to generate an LO optical signal. An adaptive fiber array is coupled to the LO light source to dephase the LO optical signal. A balanced detector is coupled to the adaptive fiber array to receive a dephased LO signal from the adaptive fiber array and an optical input signal and to generate a heterodyne signal. A controller receives the heterodyne signal and generates one or more control signals. The adaptive fiber array utilizes the control signals to dephase the LO optical signal.