Optical: systems and elements – Optical amplifier – Optical fiber
Reexamination Certificate
2007-09-24
2010-11-30
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Optical fiber
Reexamination Certificate
active
07843631
ABSTRACT:
The present invention relates to an apparatus for controlling a gain of an optical amplifier, and the apparatus comprises a target gain calculating unit for calculating, as a target gain for an optical amplifier, a value obtained by increasing or decreasing a gain (output) of signal light as the number of wavelengths of wavelength-multiplexed signal light decreases, and a control signal outputting unit for outputting a control signal to the optical amplifier so as to amplify the wavelength-multiplexed signal light with the target gain calculated by the target gain calculating unit. This promptly suppresses a fluctuation of signal light level, particularly, a fluctuation of output light power of an optical amplifier stemming from a variation of the number of wavelengths of wavelength-multiplexed signal light.
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Hayashi Etsuko
Onaka Miki
Sugaya Yasushi
Sugiya Hideaki
Bolda Eric
Fujitsu Limited
Staas & Halsey , LLP
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