Coherent beam combination of fiber laser array with multi-dithering

ma yanxing; wang xiaolin; zhou pu; ma haotong; zhao haichuan; xu xiaojun; si lei; liu zejin; zhao yijun

Volume 22 Issue 12

Dec. 2010

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Abstract

References

Article Navigation > High Power Laser and Particle Beams > 2010 > 22(12): 0-

liao shuqing, cheng cheng, zheng shuxin, et al. Experimental research of double-pulse linear induction electron accelerator[J]. High Power Laser and Particle Beams, 2009, 21.

Citation:

ma yanxing, wang xiaolin, zhou pu, et al. Coherent beam combination of fiber laser array with multi-dithering[J]. High Power Laser and Particle Beams, 2010, 22.

liao shuqing, cheng cheng, zheng shuxin, et al. Experimental research of double-pulse linear induction electron accelerator[J]. High Power Laser and Particle Beams, 2009, 21.

Citation:

ma yanxing, wang xiaolin, zhou pu, et al. Coherent beam combination of fiber laser array with multi-dithering[J]. High Power Laser and Particle Beams, 2010, 22.

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Coherent beam combination of fiber laser array with multi-dithering

1.
College of Opto-Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China

Publish Date: 2010-12-07

Abstract

Abstract

Coherent beam combining of four fiber laser beams with multi-dithering based on field programmable gate array(FPGA) control module was demonstrated. When the phase control system is in close loop, the phase errors between the beams induced by atmospheric turbulence and mechanical vibrations are compensated and the contrast of the far-field coherent combined beam profile is improved to 0.93 from 0.21 in the open loop, and the power in the given area is 3.3 times higher. Even if the fibers are dithered, the contrast of far-field beam profile is still held at 0.72.
- fiber optics,
- coherent beam combination,
- multi-dithering,
- phase-locked

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