Optical system for amplifying signal light

Details Optical system for amplifying signal light Optical system for amplifying signal light

1995-02-14

1996-11-05

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

357174, 372 6, H01S 302, H01S 310

Patent

active

055723578

ABSTRACT:
An optical amplifier for amplifying light having first and second signals includes an optical circulator for outputting light input from a first port through a second port, and outputting light input from the second port through a third port. A first amplifier for amplifying light passing therethrough is connected to the second port. A second amplifier for amplifying light passing therethrough is connected to the first amplifier. A first reflector for reflecting the first light signal, and transmitting the second light signal is arranged between the first and second amplifiers and a second reflector for reflecting the second light signal is arranged such that the second amplifier is located between the first and second reflectors. A separate branch may be connected to compensate for time difference experienced by the first and second signals when traveling through the first and second amplifiers.

REFERENCES:
patent: 5239607 (1993-08-01), da Silva et al.
patent: 5283686 (1994-02-01), Huber
patent: 5337382 (1994-08-01), Mizrahi
patent: 5392153 (1995-02-01), Delavaux
patent: 5404413 (1995-04-01), Delavaux et al.
patent: 5406411 (1995-04-01), Button et al.
patent: 5481391 (1986-01-01), Giles
Sato et al., "OTDR in Optical Amplifier Transmission Systems Using EDFAs Containing Optical Circulators", pp. 268-271.
Nishi et al., "Highly Efficient Configuration of Erbium-Doped Fiber Amplifier", pp. 99-102.
Chernikov et al., "Coupled-Cavity Erbium-Fiber Lasers Incorporating Fiber-Grating Reflectors", OFC '94 Technical Digest, Tuesday Afternoon, pp. 23-24.

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