Optical fiber amplifier

Details Optical fiber amplifier Optical fiber amplifier

1991-07-29

1992-10-13

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

359333, 359339, 359341, H01S 306, H04B 900, G02B 600

Patent

active

051556219

ABSTRACT:
An optical fiber amplifier in which light generated within an Er doped optical fiber by spontaneous emission is eliminated or suppressed. By inserting a wavelength demultiplexer in the Er doped optical fiber, the light generated within the optical fiber by spontaneous emission can be effectively eliminated. As an alternative, the Er doped optical fiber is arranged in a coil form with a predetermined radius of curvature to thereby effectively eliminate light due to spontaneous emission on the longer wavelength side than the signal light. Further, by doping the center portion of the core of an optical fiber with aluminum and the whole body of the core uniformly with erbium, it is made possible to suppress the generation of light by spontaneous emission without causing an adverse effect on the amplification performance of the signal light.

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patent: 4945531 (1990-07-01), Suzuki
patent: 5005175 (1991-04-01), Desurvire et al.
patent: 5087108 (1992-02-01), Grasso et al.

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