Gain controllable optical amplifier and applications thereof

Details Gain controllable optical amplifier and applications thereof Gain controllable optical amplifier and applications thereof

1994-09-21

1996-04-09

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359337, H01S 300

Patent

active

055067247

ABSTRACT:
An optical fiber which amplifies an input signal by a pump source, a compensation-signal source which injects a compensation-signal propagating contra-directionally with respect to the input signal Into the optical fiber, a gain detector which measures a spontaneous emission light of the pump source at an input side of the optical fiber and a compensation-signal source controller which controls output of the compensation-signal source based on output of the gain detector are provided. In addition, a coupler and a wavelength selective reflector which reflects a light of the same wavelength as the compensation-signal selectively, are provided at the input side of the optical fiber.

REFERENCES:
patent: 4938556 (1990-07-01), Digonnet et al.
patent: 5088095 (1992-02-01), Zirngibl
patent: 5136420 (1992-08-01), Inagaki et al.
patent: 5245690 (1993-09-01), Aida et al.
patent: 5299048 (1994-03-01), Suyama
patent: 5363385 (1994-11-01), Heidemann
E. Desurvire, et al "Dynamic Gain Compensation in Saturated Erbium-Doped Fiber Amplifiers" IEEE Photonics Technology Letters May, 1991.
"Automatic Gain Control in Cascaded Erbium-Doped Fibre Amplifer Systems" Electronics Letters, Jan. 1991.
Technical Digest OFC '91, Optical Fiber Communication Conference Feb. 1991.

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