A raman amplifier

Details A raman amplifier A raman amplifier

H - Electricity

04

B

H04B 10/17 (2006.01) H01S 5/04 (2006.01) H01S 3/067 (2006.01) H01S 3/094 (2006.01) H01S 3/30 (2006.01)

Patent

CA 2383722

A Raman amplifier comprises first and second stages, in which a single pump source is used for both stages. The pump source output is coupled to one end of the second stage and unused pump power is tapped from the other end of the second stage. The unused pump power is then introduced into the first stage. The attenuation of the pump source signal in the second stage results in a lower power pump signal being applied to the first stage. The specific design of the amplifier stages enables the two pump power levels to be suitable for different fiber types so that the advantages of a multi-stage amplifier are maintained (with each stage being designed taking into account the signal powers in the different stages) whilst simplifying the pump source requirements.

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