Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2006-05-16
2006-05-16
Hughes, Deandra M. (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
07046428
ABSTRACT:
Raman amplification pumping light output from a pumping light source unit is supplied to a Raman amplification optical fiber through an optical circulator. The remaining Raman amplification pumping light is detected by a light-receiving element through an optical circulator and bandpass filter. Signal light that has reached a Raman amplifier propagates through the Raman amplification optical fiber while being Raman-amplified. A control section controls the power or spectral shape of Raman amplification pumping light output from each of N pumping light sources included in the pumping light source unit on the basis of the power of the remaining Raman amplification pumping light, which is detected by the light-receiving element. Hence, a Raman amplifier capable of easily controlling gain spectrum flattening in the signal light wavelength band can be obtained.
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Murashima Kiyotaka
Tsuzaki Tetsufumi
Hughes Deandra M.
McDermott Will & Emery LLP
Sumitomo Electric Industries Ltd.
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