Spatial-multiplex, spatial-diversity optical communication schem

Details Spatial-multiplex, spatial-diversity optical communication schem Spatial-multiplex, spatial-diversity optical communication schem

1977-02-01

1978-04-18

Britton, Howard W.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

H04B 900

Patent

active

040853195

ABSTRACT:
An optical communications system for coding, transmitting, receiving, and coding digital message signals is described. A beam from a coherent optical source, such as a laser, is transmitted through an aperture in which there is disposed a random phase screen, e.g., ground glass. One or more isometric bar gratings containing the coded message data in a particular amplitude distribution pattern are disposed adjacent to the ground glass in the optical transmission path. The ground glass, phase screen, introduces a random coding to the message bit. At the receiver a plurality of point detectors sense the signals to facilitate subsequent decoding of the message.

REFERENCES:
patent: 3755676 (1973-08-01), Kinsel
patent: 3987428 (1976-10-01), Todeschini

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