Optical repeater

Details Optical repeater Optical repeater

1996-03-18

1998-04-07

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359174, 359341, 359347, H04B 1017

Patent

active

057371059

ABSTRACT:
An optical repeater is provided between terminal stations and amplifies optical signals that have entered via optical fibers in upward and downward directions and outputs the amplified optical signals to optical fibers in respective directions. The optical fiber on the output side of an upward optical amplifier and the optical fiber on the output side of a downward optical amplifier are optically coupled, with a prescribed loss, by a photocoupler. The upward optical signal is looped back to the optical fiber in the downward direction upon being attenuated by, say, 40 dB via the photocoupler, and the downward optical signal is looped back to the optical fiber in the upward direction upon being attenuated by, say, 40 dB, via the photocoupler.

REFERENCES:
patent: 4887309 (1989-12-01), Andersson et al.
patent: 4972513 (1990-11-01), Mochizuki et al.
patent: 5481390 (1996-01-01), Naito
patent: 5581397 (1996-12-01), Maki et al.

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