Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2008-07-15
2008-07-15
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C359S341320, C359S337500
Reexamination Certificate
active
07400441
ABSTRACT:
There is provided an optical amplifier including a Raman amplification medium, a rare earth doped fiber located at a latter stage of the Raman amplification medium, a first pump light outputting unit for outputting pump light with a plurality of wavelengths, a variable distribution element for distributing the pump light with the plurality of wavelengths, outputted from the first pump light outputting unit, to the Raman amplification medium and the rare earth doped fiber in a variable distribution ratio for each wavelength, and a control unit for individually controlling the distribution ratio of the pump light with the plurality of wavelengths in the variable distribution element and the power of the pump light with the plurality of wavelengths from the first pump light outputting unit in accordance with a wavelength arrangement of each of signal lights wavelength-multiplexed into the wavelength-multiplexed signal light.
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International Search Report of International Published Application No. PCT/JP2005/001958 (mailed Feb. 9, 2005).
Hayashi Etsuko
Muro Shinichirou
Sugaya Yasushi
Fujitsu Limited
Hellner Mark
Staas & Halsey , LLP
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