Duplex optical communication system with reverse Rayleigh scatte

Details Duplex optical communication system with reverse Rayleigh scatte Duplex optical communication system with reverse Rayleigh scatte

1978-06-14

1979-09-18

Britton, Howard W.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

H04B 900

Patent

active

041684273

ABSTRACT:
In a duplex optical communication system employing, at each location, the same electrooptic device alternately as a source and as a detector of optical wave energy, and using a single optical fiber to connect pairs of locations, interference produced by reverse Rayleigh scattering along the fiber is minimized by means of R-C equalizers. The modulation signal applied to the electrooptic device (11) during its transmitting period is simultaneously applied to the equalizer (20). During the receiving period, the signal stored in the equalizer is coupled to the local receiver (18), along with the signal from the electrooptic device, wherein it combines destructively with the reverse Rayleigh scattered signal produced along the fiber by the original transmission.

REFERENCES:
patent: 3508017 (1970-04-01), Unrue
patent: 3717769 (1973-02-01), Hubbard
Mims, III; Forrest M., LED Circuits and Projects, New York, Howard W. Sams and Co., Inc., pp. 60-61, 76-77, 122-123.

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