Optical amplifier and optical amplification method

Details Optical amplifier and optical amplification method Optical amplifier and optical amplification method

2006-10-17

2006-10-17

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

C359S337130

Reexamination Certificate

active

07123404

ABSTRACT:
An optical amplifier includes an output unit that outputs a loss monitoring light having a wavelength that causes neither absorption nor gain with respect to each of the wavelengths of a light signal to be amplified with EDFs; a multiplexing unit that multiplexes the loss monitoring light with the light signal at an input stage of the light signal; a demultiplexing unit that demultiplexes the loss monitoring light from multiplexed light signal at an output stage of the light signal; a detecting unit that detects intensity of loss monitoring light at the input stage and intensity of loss monitoring light at the output stage; a calculating unit that calculates, based on the intensities, a loss of the loss monitoring light that has occurred between the input stage and the output stage; and a control unit that controls, based on the loss, the variable optical attenuator.

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patent: HEI 11-220456 (1999-08-01), None
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