用于深空探测的小型轻量化全固态被动调Q激光器  

Small and Lightweight All-Solid-State Passively Q-Switched Laser for Deep-Space Exploration

作　　者：徐亚[1,2] 陈爔 王明建 戴博[1] 刘继桥[2] 于真真[2] 侯霞[2] 陈卫标[3] Xu Ya;Chen Xi;Wang Mingjian;Dai Bo;Liu Jiqiao;Yu Zhenzhen;Hou Xia;Chen Weibiao(School of Optical Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Aerospace Laser Technology and System Department,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Key Laboratory of Space Laser Communication and Detection Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]中国科学院上海光学精密机械研究所空天激光技术与系统部,上海201800 [3]中国科学院空间激光传输与探测技术重点实验室,上海201800

出　　处：《中国激光》2024年第22期86-92,共7页Chinese Journal of Lasers

摘　　要：深空探测是世界各航天强国进行空间探索和科技创新的战略制高点,探测载荷受体积、重量和功耗的限制最大。本课题组完成了一种可应用于深空探测的小型轻量化被动调Q全固态激光器样机的研制。该激光器采用COS (chip on submount)封装的808 nm单管半导体激光器端面抽运Nd∶YAG/Cr∶YAG键合晶体,实现了重复频率为1 k Hz、单脉冲能量为172μJ、脉冲宽度约为1.0 ns的1064 nm激光输出,测得激光光束的质量因子为M_(x)^(2)=1.35和M_(y)^(2)=1.27。激光器内部元器件及壳体采用全金属焊接,激光器尺寸为76.44 mm×49.58 mm×19.23 mm,质量为176.9 g,可作为深空探测及其他特殊应用环境中的激光光源。Objective Deep-space exploration typically refers to the exploration of the moon and other extraterrestrial bodies.It is integral to space activities and allows humans to further understand the universe as well as explore the origin and evolution of matter and life.For deep-space detection,laser detection is used extensively as it offers good direction and strong anti-interference ability.In addition to offering high-precision detection,space lasers should be small and lightweight such that power consumption can be reduced and reliability can be increased.In deep-space exploration,the laser-detection load is limited primarily by volume,weight,and power consumption,thus necessitating micro laser devices.In this study,a small and lightweight passive Q-switched all-solid-state laser for deep-space exploration is introduced,and its prototype is developed.The laser output features a high repetition frequency,narrow pulse width,and high pulse energy.Additionally,the laser prototype is small,lightweight,and highly reliable,thus rendering it an ideal light source for deep-space exploration.Methods To achieve a small and lightweight laser structure,passive Q-switching was performed.By selecting Nd∶YAG as the gain medium and Cr∶YAG as the passive Q-switched crystal,the gain medium and passive Q-switched crystal were bonded to achieve an integrated resonator,which can not only miniaturize the laser structure but also form a short cavity structure to achieve a narrow pulsewidth output.The laser was pumped using two single-tube COS(chip on submount)pulsed semiconductor lasers with a pulse repetition rate of 1 k Hz and a central wavelength of 808 nm.The two semiconductor lasers were connected in series,which can significantly reduce the operating current of the pumped semiconductor laser and improve the reliability of the system.The temperature was precisely controlled via a TEC(thermo-electric cooler)to ensure the absorption efficiency of the pump light.The pumped LD(laser diode)output laser was collimated by fast-and slo

关 键 词：深空探测 激光器 被动调Q 小型化 轻量化 

分 类 号：TN248.1[电子电信—物理电子学]