Closed adaptive systems with controllable bimorph mirrors

摘要

This paper describes in optical adaptive system with closed feedback for correcting the radiation of powerful femtosecond lasers. The characteristics of the clements of the system are briefly given; these include a defomable bimorph mirror and a Shack-Hartmann wave-front sensor. An algorithm based oil the principle of phase matching is presented for the operation of the system. Examples are given of the use of this system to enhance the radiation-focusing quality of lasers. For example, the use of two correctors in the ATLAS Ti:sapphire laser complex made it possible to increase the radiation-power density by more than a factor of 50. (C) 2004 Optical Society of America.