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1. (WO2001035062) OPTICAL METHOD FOR THE TRANSMISSION OF SIGNALS FROM REMOTE ARRAYS OF ELECTRICAL SENSORS

Pub. No.:    WO/2001/035062    International Application No.:    PCT/US2000/029674
Publication Date: Fri May 18 01:59:59 CEST 2001 International Filing Date: Fri Oct 27 01:59:59 CEST 2000
IPC: G01D 5/353
G01H 9/00
Applicants: LITTON SYSTEMS, INC.
Inventors: HALL, David, B.
Title: OPTICAL METHOD FOR THE TRANSMISSION OF SIGNALS FROM REMOTE ARRAYS OF ELECTRICAL SENSORS
Abstract:
An electromechanical sensor (12) produces an electrical signal in response to a change in a physical parameter being monitored. An optical phase modulator (16) is arranged such that electrical signals from the electromechanical sensor (12) causes a phase change in optical signals propagating in the two legs (46, 48) of the interferometer (44). Applying the electrical signal to the phase modulator (16) changes the optical path length difference between the interferometer legs (46, 48) and produces an optical signal that can be transmitted to a remote location. The optical signal into an electrical signal that can be processed to measure changes in the parameter.