Fiber optic amplifier

Details Fiber optic amplifier Fiber optic amplifier

1991-05-17

1992-08-18

Scott, Jr., Leon

Coherent light generators

Optical fiber laser

372 70, 372 68, 372703, H01S 330

Patent

active

051405989

ABSTRACT:
An optical fiber doped with Er is provided at its both end portions with a pair of 1.25 .mu.m band reflecting filters such that the distance therebetween becomes the resonator length for a light beam of 1.25 .mu.m band. When a pumping light beam of a wavelength of 0.8 .mu.m band is introduced into the optical fiber, laser oscillation at 1.25 .mu.m band is produced, whereby the energy level of Er in an excited state is lowered and a signal light beam of a wavelength of 1.55 .mu.m band can be optically amplified with high efficiency. Another fiber optic amplifier in which a pair of 0.98 .mu.m band reflecting filters are disposed at both end portions of an optical fiber doped with Yb and Er such that the distance therebetween becomes the resonator length for a light beam of 0.98 .mu.m band is also disclosed.

REFERENCES:
patent: 4835778 (1989-05-01), Kafka et al.
patent: 4962995 (1990-10-01), Andrews et al.

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