Patent ID: 6344925
Filing Date: 2002-02-05
Classification: H01S

Abstract:
A method of transmitting information comprising:transmitting information as an optical signal carried on at least one signal wavelength through a first optical transmission fiber; providing at least one optical amplifier in the first optical transmission fiber including an amplifying fiber configured to receive pump power as optical energy in at least one pump wavelength and amplify signal wavelengths passing through the optical amplifier and the transmission fiber; amplifying the pump power prior to introducing the pump power into the optical amplifier; introducing the amplified pump power into the optical amplifier to amplify signal wavelengths passing through the optical amplifier; receiving the information carried by the at least one signal wavelength from the first transmission fiber; providing a second optical amplifier in a second transmission fiber configured to receive second pump power as optical energy in at least one pump wavelength and amplify signal wavelengths passing through the second optical amplifier and the second transmission fiber; and, amplifying the pump power by Raman amplification using optical energy provided a common pump booster source prior to introducing the pump power into the corresponding optical amplifiers provided in the first and second transmission fibers.