Optical systems utilizing three-wave heterodyne detectors

Details Optical systems utilizing three-wave heterodyne detectors Optical systems utilizing three-wave heterodyne detectors

1976-11-04

1978-06-06

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

250211J, G01C 308

Patent

active

040933806

ABSTRACT:
Systems which utilize an optical signal to carry information and employ a ree-wave heterodyne detector of the type having a cubic response do not require a local optical signal source in the receiving apparatus since the optical signal as generated provides two optical signal components for the detector's operation. The third signal is supplied by a local microwave oscillator. A high resolution optical wave ranging system having an improved field-of-view is disclosed which uses such a composite signal in conjunction with a pair of three-wave heterodyne detectors.

REFERENCES:
patent: 3508828 (1970-04-01), Froome et al.
patent: 3825341 (1974-07-01), Goto
patent: 3864041 (1975-02-01), Long
patent: 3898453 (1975-08-01), Javan
patent: 3984675 (1976-10-01), Corcoran et al.

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