Li Kuan, Niu Chao, Wu Chunting, Yu Yongji, Ma Yao
Jilin Key Laboratory of Solid-State Laser Technology and Application, Changchun University of Science and Technology, Changchun 130022, China.
Sensors (Basel). 2023 Aug 8;23(16):7024. doi: 10.3390/s23167024.
The 2 μm wavelength belongs to the eye-safe band and has a wide range of applications in the fields of lidar, biomedicine, and materials processing. With the rapid development of military, wind power, sensing, and other industries, new requirements for 2 μm solid-state laser light sources have emerged, especially in the field of lidar. This paper focuses on the research progress of 2 μm solid-state lasers for lidar over the past decade. The technology and performance of 2 μm pulsed single longitudinal mode solid-state lasers, 2 μm seed solid-state lasers, and 2 μm high power solid-state lasers are, respectively, summarized and analyzed. This paper also introduces the properties of gain media commonly used in the 2 μm band, the construction method of new bonded crystals, and the fabrication method of saturable absorbers. Finally, the future prospects of 2 μm solid-state lasers for lidar are presented.
2μm波长属于人眼安全波段，在激光雷达、生物医学和材料加工等领域有广泛应用。随着军事、风电、传感等行业的快速发展，对2μm固态激光光源提出了新的要求，尤其是在激光雷达领域。本文重点介绍过去十年用于激光雷达的2μm固态激光器的研究进展。分别对2μm脉冲单纵模固态激光器、2μm种子固态激光器和2μm高功率固态激光器的技术和性能进行了总结与分析。本文还介绍了2μm波段常用增益介质的特性、新型键合晶体的构建方法以及可饱和吸收体的制备方法。最后，展望了用于激光雷达的2μm固态激光器的未来前景。
