摘要
本文针对无人机空中目标探测系统的空间限制,提出了一种多光束可分路扫描式被动调Q微片阵列全固态激光器的方案,采用六管芯半导体激光器阵列端面紧凑泵浦长条状的Nd:YAG/Cr^(4+):YAG键合晶体,在每一路1.6 W的泵浦功率下,产生了6路波长为1064.4 nm、脉冲宽度为2.4 ns、光束质量为1.39、峰值功率为3.75 kW、重复频率可达22 kHz的输出激光,整个系统的体积仅为2 cm×2 cm×1.5 cm,实现了6路激光同时输出。研究了调Q晶体的初始透过率和输出镜反射率对激光脉冲重复频率和峰值功率的影响机制,重点对泵浦源激光器管芯的出光一致性问题做了深入探讨,通过实验验证了使用一个激光键合晶体产生多路纳秒级窄脉冲激光束的可行性。研究结果以小型化结构实现了被动调Q全固态激光器的多光束出射,对实现激光探测系统光源的小型化和集成化有借鉴意义。
To address the spatial constraints in unmanned aerial vehicle target detection systems,a scheme for a multibeam scanning passive Q-switched microchip array solid-state laser is proposed.This system utilizes a six-core semiconductor laser array to compactly pump a strip-shaped Nd:YAG/Cr^(4+):YAG bonded crystal.At a pumping power of 1.6 W per path,it generates six output laser beams with a wavelength of 1064.4 nm,pulse width of 2.4 ns,beam quality of 1.39,peak power of 3.75 kW,and a repetition frequency up to 22 kHz.The entire system's volume is only 2 cm×2 cm×1.5 cm,and achieves simultaneous output of six laser paths.The study investigated the impact mechanism of the initial transmittance of the Q-switching crystal and the reflectivity of the output mirror on the laser pulse repetition frequency and peak power,with a particular focus on the uniformity of the laser output from the pump source cores.The feasibility of using a single laser-bonded crystal to produce multiple narrow pulse laser beams in the nanosecond range was experimentally verified.The research results demonstrate the miniaturized structure's ability to achieve multi-beam emission from a passive Q-switched solid-state laser,providing insights for the miniaturization and integration of laser sources in detection systems.
作者
王震
李立广
赵柏秦
李加庚
韩勤
WANG Zhen;LI Li-Guang;ZHAO Bai-Qing;LI Jia-Geng;HAN Qin(Key Laboratory of Optoelectronic Materials and Devices,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100190,China;Unit of 93160,Beijing 100071,China)
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2024年第4期563-571,共9页
Journal of Infrared and Millimeter Waves
基金
国家重点研发计划(2020YFB1805701)
国家自然科学基金(61934003)。
关键词
激光测距
全固态激光器
微片阵列式
小型化
被动调Q
laser ranging
solid-state laser
microchip array
miniaturization
passive Q-switched
作者简介
王震(1996-),男,山东德州人,博士生,主要研究领域为全固态激光器及驱动电路方面的研究.Email:wangzhen@semi.ac.cn;通讯作者:韩勤,E-mail:hanqin@semi.ac.cn。
