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US 2002/0163712 A1Published application
Optical fiber raman amplifier and optical fiber communication system comprising at least one such amplifer
OwnerDominique Hamoirinventor
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OwnerDominique Hamoirinventor
Estimating the term…
The present invention provides an optical fiber Raman amplifier comprising input means and output means, an optical fiber path connecting signal-transmissively said input and output means, wherein said optical fiber path comprises a plurality of single stage Raman amplifiers, further comprising means for coupling at least one pump wavelength having a shorter wavelength than a signal wavelength into each single stage Raman amplifier, wherein each single stage Raman amplifier has an individual local gain curve, wherein the local gain curves of teh single stage Raman amplifiers are selected to provide an overall flat gain curve. The invention is also directed to an optical tranmission comprising at least one such optical fiber Raman amplifier.
Optical fiber Raman amplifier comprising input means and output means, an optical fiber path connecting signal-transmissively said input and output means, wherein said optical fiber path comprises a plurality of single stage Raman amplifiers, further comprising means for coupling at least one pump wavelength having a wavelength which is shorter than a signal wavelength into each single stage Raman amplifier, wherein each single stage Raman amplifier has an individual local gain curve, characterized in that the local gain curves of the single stage Raman amplifier are selected to provide an overall flat gain curve.
Amplifier according to claim 3, characterized in that each single Raman amplifier is coupled with at least one nonidentical wavelength from the plurality of pump wavelengths.
Dependencies are inferred from the claim text.