Optical heterodyne receiver with phase or frequency lock

Details Optical heterodyne receiver with phase or frequency lock Optical heterodyne receiver with phase or frequency lock

1975-04-02

1976-08-17

Safourek, Benedict V.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

325421, H03D 124

Patent

active

039756289

ABSTRACT:
An improved optical heterodyne receiver is disclosed. Novel control circuitry is utilized in the receiver to provide compensation and tracking for undesired phase and frequency excursions of both the received and the local oscillator signals. An optical heterodyne receiver such as that disclosed is especially useful in optical communications systems having wideband variations in the frequency of the received signal caused by Doppler shifts and angle-modulated noise components.

REFERENCES:
patent: 3471803 (1969-10-01), Forster
patent: 3571597 (1971-03-01), Wood
patent: 3573463 (1971-04-01), Goodwin
patent: 3586997 (1971-06-01), Kinsel
patent: 3654473 (1972-04-01), Nussmeier
patent: 3695761 (1972-10-01), Crosswy

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