Configuration optimization of laser guide stars and wavefront correctors for multi-conjugation adaptive optics

• Published in: Chinese physics B 2016-09, Vol.25 (9), p.91-98
• Main Author: 宣丽 何斌 胡立发 李大禹 徐焕宇 张杏云 王少鑫 王玉坤 杨程亮 曹召良 穆全全 鲁兴海
• Format: Article
• Language: English
• Subjects: 三维湍流; 优化配置; 光学望远镜; 共轭; 波前校正器; 激光导星; 自适应光学; 高分辨率成像
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/25/9/094216

Multi-conjugation adaptive optics（MCAOs） have been investigated and used in the large aperture optical telescopes for high-resolution imaging with large field of view（FOV）.The atmospheric tomographic phase reconstruction and projection of three-dimensional turbulence volume onto wavefront correctors,such as deformable mirrors（DMs） or liquid crystal wavefront correctors（LCWCs）,is a very important step in the data processing of an MCAO＇s controller.In this paper,a method according to the wavefront reconstruction performance of MCAO is presented to evaluate the optimized configuration of multi laser guide stars（LGSs） and the reasonable conjugation heights of LCWCs.Analytical formulations are derived for the different configurations and are used to generate optimized parameters for MCAO.Several examples are given to demonstrate our LGSs configuration optimization method.Compared with traditional methods,our method has minimum wavefront tomographic error,which will be helpful to get higher imaging resolution at large FOV in MCAO.