Optical amplifiers with flattened gain curves

Details Optical amplifiers with flattened gain curves Optical amplifiers with flattened gain curves

1994-12-30

1996-09-17

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359160, 359130, 359161, 359124, 359333, 359341, 385 37, H01S 300, H04B 1016

Patent

active

055574424

ABSTRACT:
The present invention relates to optical systems having optical amplifiers with flattened gain curves. In one embodiment, the invention comprises an optical amplifier system having an optical input fiber and an optical amplifier device connected to receive optical input signals from the optical input fiber. A directional optical transfer device has a first port connected to receive an initial amplified output from said optical amplifier device. An optical attenuation fiber is connected to a second port of said optical transfer device, and receives the initial amplified output applied to the, first port. The optical attenuation fiber supplies an adjusted amplified output to the second port and includes plural in-fiber gratings and plural attenuators. The in-fiber gratings and attenuators are configured such that an attenuator is disposed between two in-fiber gratings. Each in-fiber gratings reflects a different wavelength of optical energy. An optical output fiber connected to a third port of the directional optical transfer device receives the adjusted amplified output.

REFERENCES:
patent: 4644145 (1987-02-01), Gundner
patent: 4963832 (1990-10-01), Desurvive et al.
patent: 5276543 (1994-01-01), Olshansky
patent: 5283686 (1994-02-01), Huber
patent: 5303314 (1994-04-01), Duling, III et al.
patent: 5311606 (1994-05-01), Asakura et al.
patent: 5325459 (1994-06-01), Schmidt
patent: 5337382 (1994-08-01), Mizrahi
patent: 5351317 (1994-09-01), Weber

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