Patent ID: 8922881

Claim:
A fiber amplifier system comprising: a splitter splitting a feedback beam into a plurality of fiber beams; a plurality of polarization controllers each receiving one of the fiber beams, said polarization controllers providing polarization orientation control; a plurality of fiber amplifiers each receiving and amplifying a fiber beam, said fiber amplifiers each including an output end; a tapered fiber bundle including an input end and an output end, said input end being coupled to the output end of all of the fiber amplifiers, said output end of the tapered fiber bundle being a combined fiber including a portion of all of the fiber amplifiers in a single fiber mass, said tapered fiber bundle outputting a combined output beam; a beam sampler for sampling a portion of the output beam from the tapered fiber bundle and providing a sample beam; a polarization detector detecting the polarization in the fiber beams in the sample beam and providing polarization measurement error signals; a synchronous polarization processor receiving the polarization measurement error signals and controlling the polarization controllers to control the orientation of the polarization of the fiber beams in the fiber amplifiers in response to the polarization measurement error signals; and a single mode fiber receiving the sample beam from the beam sampler, said single mode fiber providing the feedback beam.