Automatic gain controller of optical fiber amplifier

Details Automatic gain controller of optical fiber amplifier Automatic gain controller of optical fiber amplifier

2005-12-13

2005-12-13

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C359S341300

Reexamination Certificate

active

06975448

ABSTRACT:
An automatic gain controller for controlling gain values of an optical fiber amplifier. The automatic gain controller includes a first opto-electric conversion unit for converting a portion of optical signals that are input into the optical fiber amplifier into electrical signals to output the converted electrical signals. A second opto-electric conversion unit converts a portion of output optical signals output from the optical fiber amplifier into electrical signals and then outputs the converted electrical signals. A transient suppressing unit generates pulse typed waveforms when a change in channel number is generated during monitoring outputs of the first opto-electric conversion unit, and a comparing unit compares the sum of output signals of the transient suppressing unit and output signals of the first opto-electric conversion unit with output signals of the second opto-electric conversion unit. A control unit outputs pump control signals in response to the output signals of the transient suppressing unit and output signals of the comparing unit, and a first pumping light source unit supplies pumping light to the optical fiber amplifier in response to the inputting of the pump control signals.

REFERENCES:
patent: 6366395 (2002-04-01), Drake et al.
patent: 6501595 (2002-12-01), Drake et al.
patent: 6690506 (2004-02-01), Zahnley et al.
patent: 02000134156 (2000-05-01), None

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