Femtosecond laser beam improvement: correction of parabolic mirror aberrations by means of adaptive optics

被引:1
|
作者
Sheldakova, J. [1 ]
Kudryashov, A. [1 ]
Cherezova, T. Y. [2 ]
机构
[1] Moscow State Open Univ, Adaptive Opt Lab, Sudostroitelnaya Str 18,Bld 5, Moscow 115407, Russia
[2] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia
来源
关键词
parabolic mirror; laser beam control;
D O I
10.1117/12.774089
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
This paper describes the use of closed-loop adaptive optical system to improve the focusing of femtosecond laser beam. Our adaptive system corrects for the low-order aberrations of laser. But even if the aberrations of the laser beam are compensated the focal spot obtained with parabolic mirror is still far from ideal one. And the reason is the aberrations of the parabolic mirror and its poor adjustment. Comparison of phase-conjugate and multi-dither algorithms to correct for the parabolic mirror aberrations is presented. The principle of proper adjustment of the parabolic mirror based on M-2 minimization is shown.
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页数:8
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