Optical fiber communications system with optical fiber monitorin

Details Optical fiber communications system with optical fiber monitorin Optical fiber communications system with optical fiber monitorin

1988-12-22

1990-03-27

Sikes, William L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

350 9615, 455610, 455612, G02B 628

Patent

active

049115154

ABSTRACT:
Optical communications fibers extend from a central office to subscribers' premises for carrying signals in both directions between optical transmitters and receivers. Each subscriber's optical receiver continuously reflects back to its fiber, and then to the central office, about 20 percent of the light which it receives. At the central office the reflected light is monitored in turn for each subscriber, and is correlated with the signal transmitted to that subscriber to provide a signal for optical time domain reflectometry of the respective subscriber's fiber connection.

REFERENCES:
patent: 4436365 (1984-03-01), Hodgins et al.
patent: 4678265 (1987-07-01), Fink et al.
patent: 4801190 (1989-01-01), Imoto

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