H - Electricity – 01 – S
Patent
H - Electricity
01
S
H01S 3/131 (2006.01) H01S 3/094 (2006.01)
Patent
CA 2094732
ABSTRACT OF THE DISCLOSURE This invention relates to an optical fiber amplifier including an amplification optical fiber doped with an active material for the optical amplification for amplifying signal light by applying the signal light and pumping light to the amplification optical fiber to amplify the signal light. The optical fiber amplifier comprises optical coupling/dividing means for coupling pumping light emitted from a plurality of light sources for optical pumping, and branching the coupled light into output forward pumping light and backward pumping light, a first optical coupler for coupling the forward pumping light with signal light to apply the coupled light to the input terminal of the amplification optical fiber, and a second coupler for coupling the backward pumping light with the amplified signal light to apply the coupled light to the output terminal of the amplification optical fiber, whereby stable amplification and a good redundancy can be provided by the forward and the backward pumping light incident both on the input and the output terminals.
Marks & Clerk
Sumitomo Electric Industries Ltd.
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