Sidelobe suppression for coherent beam combining with laser beams placed along a Fermat spiral
CHINESE OPTICS LETTERS(2022)
摘要
We proposed an aperiodic laser beam distribution, in which the laser beams are placed along a Fermat spiral, to suppress the sidelobe power in the coherent beam combining. Owing to the changed distances between two consecutive beams, the conditions of the sidelobe suppression are naturally satisfied. The Fermat spiral array was demonstrated to achieve a better sidelobe suppression than the periodic arrays, and the effects of various factors on the sidelobe suppression were analyzed numerically. Experiments were carried out to verify the sidelobe suppression by different Fermat spiral arrays, and the results matched well with the simulations.
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关键词
coherent beam combining,sidelobe suppression,Fermat spiral,intensity distribution
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