量子电子学报 ›› 2020, Vol. 37 ›› Issue (4): 430-446.

• “激光大气传输与探测”专辑 • 上一篇    下一篇

钠信标激光技术进展


薄勇1, 卞奇1, 彭钦军1, 许祖彦1, 魏凯2, 张雨东2, 冯麓3, 薛随建3   


  1. 1 中国科学院理化技术研究所激光物理与技术研究中心, 北京100190; 2 中国科学院光电技术研究所自适应光学实验室, 四川成都610209; 3 中国科学院国家天文台, 北京100012
  • 收稿日期:2020-03-06 修回日期:2020-03-20 出版日期:2020-07-28 发布日期:2020-07-21
  • 作者简介:薄勇( 1972 - ), 北京人,博士,研究员,主要从事固体激光及其频率变换技术方面的研究。E-mail: boyong@mail.ipc.ac.cn
  • 基金资助:
    Supported by National Natural Science Foundation of China (国家自然科学基金, 61505226, 11504389, 11504390), National Key Research and Development Program of China (国家重点研究和开发项目, 2016YFB0402003)

Development of Sodium Beacon Laser

BO Yong1, BIAN Qi1, PENG Qinjun1, XU Zuyan1, WEI Kai2, ZHANG Yudong2, FENG Lu3, XUE Suijian3   

  1. 1 Research Center for Laser Physics and Technique, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; 2 Key Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China; 3 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
  • Received:2020-03-06 Revised:2020-03-20 Published:2020-07-28 Online:2020-07-21

摘要: 地基光学望远镜对天观测时, 大气湍流扰动引起星光波前畸变将导致其实际分辨率远低于物理极限, 这 是急需解决的科学技术问题。采用钠信标激光激发海拔80∼105 km 大气电离层中的钠原子可产生高亮度的钠导 引星, 可作为信标探测大气对光波的扰动, 再利用自适应光学技术进行校正, 能使望远镜克服大气扰动影响, 获得 近衍射极限的分辨率。介绍了钠信标激光的特性与国内外研究进展, 尤其是中国科学院理化技术研究所激光物理 与技术研究中心研制的钠D2 线双峰谱型匹配的微秒脉冲钠信标激光器及其在大型望远镜上的应用情况。

关键词: 自适应光学, 钠信标激光, 微秒脉冲激光, 钠导引星

Abstract: The spatial resolution of the large ground-based optical telescope is far below its diffraction limitation because atmospheric turbulence distorts light waves from the observed space objects, which is a critical scientific and technological problem to be solved urgently. Using sodium beacon laser to excite sodium atoms in the upper atmosphere at an altitude of 80∼105 km can create a high brightness sodium guide star, which can be used as a beacon to detect the wavefront aberration caused by atmospheric turbulence. As the wavefront aberration can be corrected by using adaptive optics system, the imaging resolution of large ground-based telescope will be significantly improved to be near its diffraction limitation. The development of sodium beacon laser is described in detail, especially the micro-second pulse sodium beacon laser with spectral format matched to the mesospheric D2 line developed in Research Center for Laser Physics and Technique, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, as well as its successful application in some large ground-based optical telescopes.

Key words: adaptive optics, sodium beacon laser, microsecond pulsed laser, sodium laser guide star

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