Two-way optic communication system for atmospheric use

Details Two-way optic communication system for atmospheric use Two-way optic communication system for atmospheric use

1989-01-05

1989-12-19

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

370 2, 455617, H04B 900

Patent

active

048888168

ABSTRACT:
An improved laser-driven, two-way optic communication system for atmosphe 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 rotater 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 the 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.

REFERENCES:
patent: 4280764 (1981-07-01), Sica et al.
patent: 4491867 (1985-01-01), Huignard
patent: 4533247 (1985-08-01), Epworth
Article entitled "Interferometer With a Self-Pumped Phase-Co".

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