Optical: systems and elements – Optical amplifier – Beam combination or separation
Reexamination Certificate
2008-04-22
2008-04-22
Hughes, Deandra M (Department: 3663)
Optical: systems and elements
Optical amplifier
Beam combination or separation
C359S334000
Reexamination Certificate
active
11371093
ABSTRACT:
A Raman amplifier for amplifying a wavelength division multiplexed (WDM) light including signal lights wavelength division multiplexed together. The amplifier includes an optical amplifying medium and a controller. The optical amplifying medium uses Raman amplification to amplify the WDM light in accordance with multiplexed pump lights of different wavelengths traveling through the optical amplifying medium. The WDM light is amplified in a wavelength band divided into a plurality of individual wavelength bands. The controller controls power of each pump light based on a wavelength characteristic of gain generated in the optical amplifying medium in the individual wavelength bands.
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Hayashi Etsuko
Onaka Miki
Sugaya Yasushi
Tanaka Tomoto
Fujitsu Limited
Hughes Deandra M
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