Two-dimensional diffractive coherent combining of 15 fiber amplifiers into a 600 W beam
作者： Peter A. Thielen , James G. Ho , David A. Burchman , Gregory D. Goodno , Joshua E. Rothenberg
DOI: 10.1364/OL.37.003741
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摘要: We demonstrate coherent beam combining using a two-dimensionally patterned diffractive optic element. Fifteen Yb-doped fiber amplifier beams arranged in 3×5 array were combined into single 600 W, M2=1.1 output with 68% efficiency. Combining losses under thermally stable conditions at 485 W found to be dominated by spatial mode-mismatch between the free space input beams, quantitative agreement calculations measured amplitude and phase profiles of beams.
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