Two-Way Optic Communication System for Atmospheric Use.
Patent, Filed 5 Jan 89, patented 19 Dec 89,
DEPARTMENT OF THE NAVY WASHINGTON DC
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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 combinedreflected 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
- Command, Control and Communications Systems