Martin G Hodgins

US Patent:

44363656, Mar 13, 1984

Filed:

Oct 21, 1981

Appl. No.:

6/313600

Inventors:

Martin G. Hodgins - Yorktown Heights NY
William J. Jordan - Whippany NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

G02B 5174

US Classification:

350 9616

Abstract:

A transmission link is established between remote electrical transducers, e. g. , underwater, and a monitoring receiver, e. g. , shore-based, over an optical fiber link using integrated optical waveguides. Optical directional couplers with absorber and reflector elements incorporated in the waveguides at respective terminals of the transmission link permit the injection of light into the fiber at the monitoring terminal and the modulation of reflected light at the transducer terminal in accordance with an electrical signal from the transducer. No electrical energy then needs to be transmitted between the monitoring and transducing terminals of the transmission link. The link itself is thus light in weight and free of electrical currents subject to electromagnetic interference.