Raman optical amplifier, optical transmission system, and method for adjusting raman optical amplifier
AssigneeFujitsu Limited
InventorTakashi SATO
Life of this patent
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Abstract
A Raman optical amplifier includes a pumping source configured to include a plurality of laser elements including different wavelengths, the plurality of laser elements being configured as pumping sources including a gain in a wavelength band obtained by adding a first wavelength band in operation and a second wavelength band to be added, wherein a pumping ratio between the plurality of laser elements is adjusted so that a gain spectrum of the Raman optical amplifier becomes flat over the wavelength band obtained by adding the first wavelength band and the second wavelength band.
Claims8
A Raman optical amplifier comprising:
- a pumping source configured to include a plurality of laser elements including different wavelengths, the plurality of laser elements being configured as pumping sources including a gain in a wavelength band obtained by adding a first wavelength band in operation and a second wavelength band to be added,
- wherein a pumping ratio between the plurality of laser elements is adjusted so that a gain spectrum of the Raman optical amplifier becomes flat over the wavelength band obtained by adding the first wavelength band and the second wavelength band.
An optical transmission system comprising:
- a Raman optical amplifier arranged in a transmission line and configured to include a pumping source that includes a plurality of laser elements including different wavelengths, the plurality of laser elements being configured as pumping sources including a gain in a wavelength band obtained by adding a first wavelength band in operation and a second wavelength band to be added,
- wherein a pumping ratio between the plurality of laser elements is adjusted so that a gain spectrum of the Raman optical amplifier becomes flat over the wavelength band obtained by adding the first wavelength band and the second wavelength band;
- and
- a processor configured to control the Raman optical amplifier.
A method for adjusting a Raman optical amplifier comprising:
- adjusting a pumping ratio between a plurality of laser elements configured as pumping sources including a gain in a wavelength band obtained by adding the first wavelength band in operation and the second wavelength band to be added, so that a gain spectrum of the Raman optical amplifier becomes flat over the wavelength band obtained by adding the first wavelength band and the second wavelength band, a pumping source of the pumping sources including the plurality of laser elements including different wavelengths.
Dependencies are inferred from the claim text.