Adaptive optics system for a short wavelength mid-IR laser based on a Shack-Hartmann wavefront sensor and analysis of thermal noise impacts

被引:1
作者
Zhou, Huang [1 ,2 ]
Pilar, Jan [2 ]
Smrz, Martin [2 ]
Chen, Liyuan [2 ]
Cech, Miroslav [1 ]
Mocek, Tomas [2 ]
机构
[1] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Brehova 7, Prague 11519, Czech Republic
[2] Czech Acad Sci, Inst Phys, HiLASE Ctr, Radnici 828, Dolni Brezany 25241, Czech Republic
关键词
MIRRORS; DESIGN; RECONSTRUCTION; ALGORITHMS; MICROSCOPY;
D O I
10.1364/AO.464676
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We present an adaptive optics (AO) system for a 1.94-mu m laser source. Our system consists of a home-made Shack-Hartmann wavefront sensor and silver-coated bimorph deformable mirror operating in a closed-loop control scheme. The wavefront sensor used an uncooled vapor phase deposition PbSe focal-plane array for the actual light sensing. An effect of thermal afterimage was found to be reducing the centroid detection precision significantly. The effect was analyzed in detail and finally has been dealt with by updating the background calibration. System stability was increased by reduction of control modes. The system functionality and stability were demonstrated by improved focal spot quality. By replacing some of the used optics, the range of the demonstrated mid-IR AOS could be extended to cover the spectral range of 1-5 mu m. To the best of our knowledge, it is the first AO system built specifically for mid-IR laser wavefront correction. (C) 2022 Optica Publishing Group
引用
收藏
页码:7958 / 7965
页数:8
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