All-fiber integrated high power coherent beam combination
First Claim
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1. A fiber amplifier system comprising:
- a master oscillator generating a signal beam;
a splitter splitting the signal beam into a plurality of fiber beams;
a plurality of phase modulators each receiving one of the fiber beams, said phase modulators providing phase modulation;
a plurality of fiber amplifiers each receiving a fiber beam from one of the phase modulators, said fiber amplifiers amplifying the 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 portions of all of the fiber amplifiers with fiber cores in a single fiber mass, said tapered fiber bundle outputting a combined output beam;
an end cap optically coupled to the output end of the taper fiber bundle, said end cap expanding the output beam from the tapered fiber bundle; and
a beam sampler for sampling a portion of the output beam from the end cap and providing a sample beam.
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Abstract
A fiber laser amplifier system including a master oscillator that generates a signal beam. A splitter splits the signal beam into a plurality of fiber beams where a separate fiber beam is sent to a fiber amplifier for amplifying the fiber beam. A tapered fiber bundle couples all of the output ends of all of the fiber amplifiers into a combined fiber providing a combined output beam. An end cap is optically coupled to an output end of the tapered fiber bundle to expand the output beam.
108 Citations
20 Claims
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1. A fiber amplifier system comprising:
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a master oscillator generating a signal beam; a splitter splitting the signal beam into a plurality of fiber beams; a plurality of phase modulators each receiving one of the fiber beams, said phase modulators providing phase modulation; a plurality of fiber amplifiers each receiving a fiber beam from one of the phase modulators, said fiber amplifiers amplifying the 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 portions of all of the fiber amplifiers with fiber cores in a single fiber mass, said tapered fiber bundle outputting a combined output beam; an end cap optically coupled to the output end of the taper fiber bundle, said end cap expanding the output beam from the tapered fiber bundle; and a beam sampler for sampling a portion of the output beam from the end cap and providing a sample beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A fiber amplifier system comprising:
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a master oscillator generating a signal beam; a splitter splitting the signal beam into a plurality of fiber beams; a plurality of phase modulators each receiving one of the fiber beams, said phase modulators providing phase modulation; 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 a fiber beam after the phase modulator and polarization controller, said fiber amplifiers amplifying the 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 portions of all of the fiber amplifiers with fiber cores in a single fiber mass, said tapered fiber bundle outputting a combined output beam; an end cap optically coupled to the output end of the tapered fiber bundle, said end cap expanding the output beam from the tapered fiber bundle; a beam sampler for sampling a portion of the output beam from the end cap and providing a sample beam; a polarization detector detecting the polarization in the fiber beams in the sample beam and providing polarization error measurement signals; a synchronous polarization processor receiving the polarization error measurement 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 signals; and a collimating and magnifying telescope receiving the output beam from the end cap before the beam sampler, said collimating and magnifying telescope expanding and collimating the output beam. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification