Raman amplification
AssigneeNortel Networks Limited
InventorsChristopher Fludger, Nigel Jolley
Life of this patent
Estimating the term…
Abstract
An optical transmission system comprising a first optical waveguide suitable for transmitting a first information signal, a second optical waveguide suitable for transmitting a second information signal, and input means for providing an electro magnetic radiation signal into said first waveguide, said signal being suitable for providing Raman amplification of the information signals, the system further comprising an optical coupling between said waveguides, arranged to transmit at least a portion of the Raman amplification signal from the first waveguide to the second whilst substantially blocking the transmission of the information signals between the waveguides.
Claims16
An optical transmission system comprising a first optical waveguide suitable for transmitting a first information signal, a second optical waveguide suitable for transmitting a second information signal different from the fir information signal, the first and second waveguides extending along substantially a full length of transmission path of the system, and input means for providing an electro magnetic radiation signal into said first waveguide, said signal being suitable for providing distributed Raman amplification of the information signals along at least part of the transmission path, the system further comprising an optical coupling between said waveguides, arranged to transmit at least a portion of the Raman amplification signal from the first waveguide to the second after the Raman amplification signal has travelled along at least part of the transmission path, whilst substantially blocking the transmission of the information signals between the waveguides.
A method of providing distributed Raman amplification to a communications system, the system comprising a first optical waveguide suitable for transmitting a first information signal the first and second waveguides extending along substantially a full length of a transmission path of the system, and a second optical waveguide suitable for transmitting a second information signal different from the first information signal, the method comprising the steps of:
- providing an electro magnetic radiation signal into said first waveguide, said signal being suitable for providing distributed Raman amplification of the information signals along at least part of the transmission path;
- and transferring at least a portion of the Raman amplification signal to said second waveguide after the Raman amplification signal has travelled along part of the transmission path.
A computer programme arranged to control a communications system so as to perform the method of providing distributed Raman amplification to a communications system, the system comprising a first optical waveguide suitable for transmitting a first information signal and a second optical waveguide suitable for transmitting a second information signal differing from the first, the first and second waveguides extending along substantially a full length of a transmission path of the system, the method comprising the steps of:
- providing an electro magnetic radiation system into said first waveguide, said signal being suitable for providing distributed Raman amplification of the information signals;
- and transferring at least a portion of the Raman amplification signal to said second waveguide after the Raman amplification signal has travelled along part of the transmission path.
Dependencies are inferred from the claim text.