The correction of wavefront distortion of a laser beam is a key issue for high power laser delivery systems. For this purpose, we have developed a closed-loop adaptive optics system, which consists of a Shac-Hartmann wavefront sensor, a multichannel deformable mirror and a control computer. In this paper, the closed-loop wavefront control algorithms are discussed. The closed-loop wavefront correction was performed using a zonal control algorithm. Also, we proposed a new control algorithm using zonal control with a coupling factor. We can compensate for an arbitrary wavefront distortion of a laser beam in real time. The wavefront correction bandwidth was 5 Hz by using direct correction methods of zonal control. Although tie correction speed becomes slow in the new algorithm, the correction accuracy was more stable.
Zonal control with coupling factor using an adaptive optics system at Kaeri
01.01.2003
79263 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Zonal control with coupling factor using an adaptive optics system at KAERI
British Library Conference Proceedings | 2003
|A Compact THz Free Electron Laser at KAERI
IEEE | 2006
|Adaptive Control for the IOS Adaptive Optics System
NTRS | 2019
|