Patent ID: 6356383
Filing Date: 2002-03-12
Classification: H01S,H04B

Abstract:
A method of amplifying optical signals comprising:transmitting optical signals in a transmission media configured to transmit and provide Raman amplification of the optical signals; counter-propagating optical energy in the transmission media in a first pump wavelength range to produce Raman amplification of the optical signals, wherein the Raman amplification has a corresponding noise figure profile over an optical signal wavelength range; and, co-propagating optical energy with the optical signals in a second pump wavelength range to vary the noise figure profile of the Raman amplification produced by said counter-propagating optical energy over at least a portion of the optical signal wavelength range; wherein said co-propagating includes co-propagating optical energy in the second pump wavelength range that overlaps with shorter wavelengths in the first wavelength range.