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

Autor:	Alexis Kudryashov, Tatyana Yu. Cherezova, Julia Sheldakova
Rok vydání:	2008
Předmět:	Physics Parabolic reflector business.industry Astrophysics::Instrumentation and Methods for Astrophysics Laser law.invention Optics law Femtosecond Focal spot business Adaptive optics Phase conjugation Laser beams Optical aberration
Zdroj:	Laser Resonators and Beam Control X.
ISSN:	0277-786X
DOI:	10.1117/12.774089
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7f89c70711cca7ddf67a48ca41d7d27b https://doi.org/10.1117/12.774089 Zobrazit plný text záznamu