Journal of Atmospheric and Environmental Optics ›› 2025, Vol. 20 ›› Issue (3): 299-311.doi: 10.3969/j.issn.1673-6141.2025.03.005

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Research on atmospheric metal layers detection technology by all-solid-state optical parametric oscillator lidar

DU Lifang 1, XIAO Chunlei 2, ZHENG Haoran 1, CHENG Xuewu 3, GUO Jixin 1,4, WU Fang 1,4, LI Faquan 3, JIAO Jing 1, FANG Shuo 2, LIN Zhaoxiang 5, XUN Yuchang 6, CHEN Zhishan 6, YANG Guotao 1*   

  1. 1 National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China; 2 Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; 3 Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; 4 University of Chinese Academy of Sciences, Beijing 100049, China; 5 South-Central Minzu University, Wuhan 430074, China; 6 Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2025-01-27 Revised:2025-04-09 Online:2025-05-28 Published:2025-05-26

Abstract: This paper introduces an all-solid-state lidar system based on optical parametric oscillator (OPO) and optical parametric amplification (OPA) technology, and its application in the detection of atmospheric metal components. The lidar system is distinguished by its high output energy (up to 100 mJ), narrow linewidth (< 200 MHz), and the excellent uniformity of laser spot, which significantly enhances its sensitivity for detecting metal ions in the atmosphere, and a detection sensitivity of 0.02 cm−³ for metal ions can be achieved at 1 km in 1 hour integration time. In the field experiments conducted in Beijing, Mohe, and other sites, the overnight evolution data of calcium atoms and ions were successfully obtained using the lidar system, and calcium ion layers extending up to 300 km in altitude were detected. These results indicate that, compared with traditional dye laser technology, the all-solid-state lidar has the advantages of high sensitivity and high resolution, and a series of new phenomena detected are expected to promote the discovery of new processes and mechanisms in space physics. In addition, this paper also discusses the prospective applications of this technology in advancing lidar detection capabilities.

Key words: atmospheric metal layers, lidar, optical parametric oscillation and optical parametric amplification technologies, calcium and calcium ion layer

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