Accession Number : ADD014456

Title :   Two-Way Optic Communication System for Atmospheric Use.

Descriptive Note : Patent, Filed 5 Jan 89, patented 19 Dec 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Sica, Louis, Jr

Report Date : 19 Dec 1989

Pagination or Media Count : 14

Abstract : An improved laser-driven, two-way optic communication system for atmospheric use and enabling communication between remote stations. The system is generally made up of a transmitter-receiver (TR) arrangement at one station and a cooperative transmitter-receiver (CTR) arrangement at another station. The TR arrangement is generally made up of laser source beam means, polarizer means, polarized beam rotator means and appropriate lens means. The CTR arrangement is generally made up of appropriate lens means, beam splitter means and first and second phase conjugate mirror (PCM) means. The PCM means are mounted on piezoelectric means that are selectively dithered so as to enable control of the return signal. The TR means causes propagation of a rotated laser source beam polarization output via atmosphere to the CTR arrangement during system use. The CTR arrangement in response to the received laser beam from the TR provides transmission of combined/reflected and phase conjugated beams that are not subject to atmospheric turbulence so as to provide an enhanced two-way communication link with minimal light leakage between the CTR and TR. Patents. (RRH)

Descriptors :   *LASER BEAMS, *PATENTS, ATMOSPHERIC MOTION, BEAM SPLITTING, LIGHT, MIRRORS, PHASE, POLARIZATION, REMOTE AREAS, ROTATION, SECONDARY, SOURCES, STATIONS, TURBULENCE

Subject Categories : Command, Control and Communications Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE