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Diffractive Coherent Combining of >kW Fibers

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Abstract

Three non-PM, kW-class fiber amplifiers were coherently combined into a 2.4-kW, M2=1.2 beam with 80% efficiency. No power-limiting effects were observed, which anchored scaling predictions to higher powers and efficiencies with larger fiber count arrays.

© 2014 Optical Society of America

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