Optical pumping apparatus for few-mode fiber amplification

摘要

An optical pumping apparatus for few-mode fiber amplification is provided. The optical pumping apparatus includes an optical pump source configured to generate an optical pump; an optical power divider configured to divide an optical power of the optical pump from the optical pump source so as to output several optical pumps with uniformly distributed optical power; and a modal multiplexer configured to receive the optical pumps from the optical power divider through a plurality of single-mode fibers, multiplex the received optical pumps, apply a multiplexed optical pump to each mode of a few-mode fiber (FMF) amplifier, and adjust a gain difference among modes, wherein the FMF amplifier obtains a gain by amplifying an optical signal with the optical pump.

主权项

1. An optical pumping apparatus comprising:
an optical pump source configured to generate an optical pump; an optical power divider configured to divide an optical power of the optical pump from the optical pump source so as to output several optical pumps with uniform optical power; and a modal multiplexer configured to receive the optical pumps from the optical power divider through a plurality of single-mode fibers, multiplex the received optical pumps, apply a multiplexed optical pump to each mode of a few-mode fiber (FMF) amplifier, and adjust a gain difference among modes, wherein the FMF amplifier obtains a gain by amplifying an optical signal with the optical pump, wherein:
the modal multiplexer is configured to connect the plurality of single-mode fibers and a single few-mode fiber, andthe modal multiplexer comprises:
input ports comprising a plurality of single-mode fibers which are spaced apart from one another, thereby preventing coupling therebetween, and through which a plurality of optical pumps are received; andan output port configured to output the multiplexed optical pump to the few-mode fiber for all modes, support for which is provided by a tapered end portion of the modal multiplexer, in which coupling among the plurality of single-mode fibers of the input ports takes place.