| Department | 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, Jian1,2,3; Wei, Kai1,2; Jin, Kai1,2,3; Li, Min1,2; Zhang, YuDong1,2 | |
| Source Publication | OPTICS COMMUNICATIONS
 |
| Volume | 416Pages:172-180 |
| 2018-06-01 | |
| Language | 英语 |
| ISSN | 0030-4018 |
| DOI | 10.1016/j.optcom.2018.02.005 |
| Indexed By | SCI ; Ei |
| WOS ID | WOS:000427535300028 |
| EI Accession Number | 20180804820552 |
| Subtype | J |
| Abstract | 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. |
| Keyword | Adaptive optics Power distribution Pre-correction Laser beam shaping Atmospheric propagation Atmospheric turbulence |
| WOS Keyword | ON-SKY TEST ; DEFORMABLE MIRRORS ; ADAPTIVE OPTICS ; SCINTILLATION ; PROJECTION ; ASTRONOMY ; SYSTEMS |
| EI Keywords | Atmospheric thermodynamics ; Atmospheric turbulence ; Errors ; Gaussian beams ; High power lasers ; Laser beams ; Photons ; Sodium ; Stars |
| EI Classification Number | 443.1 Atmospheric Properties ; 549.1 Alkali Metals ; 657.2 Extraterrestrial Physics and Stellar Phenomena ; 711 Electromagnetic Waves ; 741.1 Light/Optics ; 744.1 Lasers, General ; 744.8 Laser Beam Interactions ; 931.3 Atomic and Molecular Physics |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ioe.ac.cn/handle/181551/9335 |
| Collection | 自适应光学技术研究室（八室） |
| Affiliation | 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 |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2018-2102.pdf（2753KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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