Optical amplifier and optical amplifier gain control method and

Details Optical amplifier and optical amplifier gain control method and Optical amplifier and optical amplifier gain control method and

1997-12-09

1999-12-28

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359134, H01S 300

Patent

active

060089350

ABSTRACT:
An optical amplifier for amplifying and outputting an input light signal, comprises an optical light amplifier unit (10), a tunable wavelength filter (30), a signal light detection unit, and a control circuit (100). The optical amplifier unit (10) amplifies the input light signal and outputs an amplified light signal. The tunable wavelength filter (30), into which the amplified light signal is inputted and which transmission light wavelength is swept, outputs a filter output signal. The signal light detection unit detects a signal light level of an amplified output component in the amplified light signal in response to said input light signal. The control circuit (100) controls a gain of said optical amplifier unit based on the signal light level. Further, the signal light detection unit of the optical amplifier according to the present invention comprises a peak detection unit (60) and a background light detection unit (70). The peak detection unit (60) detects a peak light level of the filter output signal. The background light detection unit (70) detects a background light level of the filter output signal.

REFERENCES:
patent: 5706126 (1998-01-01), Fujita
patent: 5784192 (1998-07-01), Sugiyama et al.
patent: 5808785 (1998-09-01), Nakabayashi
patent: 5828486 (1998-10-01), Yoshida
patent: 5859725 (1999-01-01), Sugiya et al.
patent: 5861980 (1999-01-01), Ono
patent: 5864423 (1999-01-01), Kosaka
patent: 5896221 (1999-04-01), Saeki

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