Controlling the Laser Guide Star power density distribution at Sodium layer by combining Pre-correction and Beam-shaping

doi:10.1016/j.optcom.2018.02.005

CORC > 光电技术研究所 > 中国科学院光电技术研究所 > 自适应光学技术研究室（八室）

	Controlling the Laser Guide Star power density distribution at Sodium layer by combining Pre-correction and Beam-shaping
	Huang, Jian 1,2,3; Wei, Kai 1,2; Jin, Kai 1,2,3; Li, Min 1,2; Zhang, YuDong 1,2
刊名	OPTICS COMMUNICATIONS
	2018-06-01
卷号	416 页码:172-180
关键词	Adaptive optics Power distribution Pre-correction Laser beam shaping Atmospheric propagation Atmospheric turbulence
ISSN号	0030-4018
DOI	10.1016/j.optcom.2018.02.005
文献子类	J
英文摘要	The Sodium laser guide star (LGS) plays a key role in modern astronomical Adaptive Optics Systems (AOSs). The spot size and photon return of the Sodium LGS depend strongly on the laser power density distribution at the Sodium layer and thus affect the performance of the AOS. The power density distribution is degraded by turbulence in the uplink path, launch system aberrations, the beam quality of the laser, and so forth. Even without any aberrations, the TE00 Gaussian type is still not the optimal power density distribution to obtain the best balance between the measurement error and temporal error. To optimize and control the LGS power density distribution at the Sodium layer to an expected distribution type, a method that combines pre-correction and beam-shaping is proposed. A typical result shows that under strong turbulence (Fried parameter (r(0)) of 5 cm) and for a quasi-continuous wave Sodium laser (power (P) of 15 W), in the best case, our method can effectively optimize the distribution from the Gaussian type to the "top-hat'' type and enhance the photon return flux of the Sodium LGS; at the same time, the total error of the AOS is decreased by 36% with our technique for a high power laser and poor seeing.
WOS关键词	ON-SKY TEST ; DEFORMABLE MIRRORS ; ADAPTIVE OPTICS ; SCINTILLATION ; PROJECTION ; ASTRONOMY ; SYSTEMS
语种	英语
WOS记录号	WOS:000427535300028
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/9335]
专题	光电技术研究所_自适应光学技术研究室（八室）
作者单位	1.Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu, Sichuan; 610209, China; 2.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, Sichuan; 610209, China; 3.University of Chinese Academy of Sciences, Beijing; 100049, China
推荐引用方式 GB/T 7714	Huang, Jian,Wei, Kai,Jin, Kai,et al. Controlling the Laser Guide Star power density distribution at Sodium layer by combining Pre-correction and Beam-shaping[J]. OPTICS COMMUNICATIONS,2018,416:172-180.
APA	Huang, Jian,Wei, Kai,Jin, Kai,Li, Min,&Zhang, YuDong.(2018).Controlling the Laser Guide Star power density distribution at Sodium layer by combining Pre-correction and Beam-shaping.OPTICS COMMUNICATIONS,416,172-180.
MLA	Huang, Jian,et al."Controlling the Laser Guide Star power density distribution at Sodium layer by combining Pre-correction and Beam-shaping".OPTICS COMMUNICATIONS 416(2018):172-180.