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

J. Sheldakova; A. Kudryashov; T. Y. Cherezova

doi:10.1117/12.774089

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20 February 2008 Femtosecond laser beam improvement: correction of parabolic mirror aberrations by means of adaptive optics

J. Sheldakova, A. Kudryashov, T. Y. Cherezova

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Proceedings Volume 6872, Laser Resonators and Beam Control X; 687203 (2008) https://doi.org/10.1117/12.774089
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

Abstract

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 M² minimization is shown.

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J. Sheldakova, A. Kudryashov, and T. Y. Cherezova "Femtosecond laser beam improvement: correction of parabolic mirror aberrations by means of adaptive optics", Proc. SPIE 6872, Laser Resonators and Beam Control X, 687203 (20 February 2008); https://doi.org/10.1117/12.774089

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