Low tilt, high gain fiber amplifier

Details Low tilt, high gain fiber amplifier Low tilt, high gain fiber amplifier

1995-12-19

1998-01-20

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

359337, H01S 330, G02B 634

Patent

active

057106592

ABSTRACT:
An optical amplifier having high overall gain and low gain tilt, useful in an optical transmission system or the like. The amplifier has a doped optical fiber as the amplification medium and two pumps, the shorter wavelength one propagating with the signal being amplified and the longer wavelength one propagating opposite the signal being amplified. A wavelength selective reflective fiber grating is disposed along the doped fiber to reflect the second pump signal. The addition of the grating allows the amplifier to have a higher gain with a lower gain tilt than amplifiers without the grating. Positioning the grating along the fiber allows for the control of the overall gain with respect to the gain tilt for a given fiber length.

REFERENCES:
patent: 5142660 (1992-08-01), Chang et al.
patent: 5200964 (1993-04-01), Huber
patent: 5218608 (1993-06-01), Aoki
patent: 5218655 (1993-06-01), Mizrahi
patent: 5253104 (1993-10-01), Delavaux
patent: 5271024 (1993-12-01), Huber
patent: 5287216 (1994-02-01), Chirravuri et al.
patent: 5416865 (1995-05-01), Fielding
patent: 5532864 (1996-07-01), Alexander et al.
Lipka et al, Electr. Lett., vol. 30, N23, Nov. 10, 1994, pp. 1940-1941; abst. only herewith.

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