Optical amplifier with reduced surge output

Details Optical amplifier with reduced surge output Optical amplifier with reduced surge output

1997-07-10

1999-04-06

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359177, H03F 126

Patent

active

058926160

ABSTRACT:
An optical amplifier changes a characteristic of controlling a current supplied to an exciter laser diode in response to the level of an optical input signal provided to the optical amplifier, thereby reducing a surge in the optical output of the optical amplifier caused by a sudden fluctuation in the optical input signal. The optical amplifier has an input variation detector and an automatic level controller. The input variation detector provides a signal that represents a change in the optical input signal. The automatic level controller controls an excitation beam according to a monitor signal from an optical output monitor, so that the optical output signal keeps a constant level. The automatic level controller has a loop gain controller that controls the gain of an automatic level controlling loop according to the signal from the input variation detector.

REFERENCES:
patent: 5589975 (1996-12-01), Nakamura et al.
patent: 5701195 (1997-12-01), Chikama
patent: 5703711 (1997-12-01), Hamoda
patent: 5737118 (1998-04-01), Sugaya et al.
Aoki et al., Optical Amplifier, Patent Abstracts of Japan, JP-A-07240717, 12 Aug. 1995.

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