基于a切Er,Yb:YAl_(3)(BO_(3))_(4)晶体被动调Q微片激光器  

Passively Q-Switched a-Cut Er, Yb∶YAl_(3)(BO_(3))_(4) Microchip Laser

作　　者：查松青 陈雨金[2] 邓鸣瑶 林炎富[2] 李丙轩[2] 邹宇琦[3] 廖文斌[2] 林长浪 张戈[2] Zha Songqing;Chen Yujin;Deng Mingyao;Lin Yanfu;Li Bingxuan;Zou Yuqi;Liao Wenbin;Lin Zhanglang;Zhang Ge(School of Chemistry,Fuzhou University,Fuzhou,Fujian 351100,China;Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou,Fujian 351100,China;Shanghai Institute of Ceramics,Chinese Academy of Science,Shanghai 200000;College of Chemistry and Materials Science,Fujian Normal University,Fuzhou,Fujian 351100,China)

机构地区：[1]福州大学化学学院,福建福州351100 [2]中国科学院福建物质结构研究所,福建福州351100 [3]中国科学院上海硅酸盐研究所,上海200000 [4]福建师范大学化学与材料学院,福建福州351100

出　　处：《中国激光》2021年第13期47-53,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61875199,61975208);中国科学院先导研究项目(XDB20000000);中国科学院科技网络服务项目(KFJ-STS-QYZX-069);福建省科学基金(2019J02015);科技部重点研发专项(2018YFB2201101)。

摘　　要：报道了基于a切Er,Yb:YAl3(BO3)4晶体的被动调Q微片激光器的性能。使用波长为976 nm的光纤耦合半导体二极管作为端面抽运光源,使用初始透过率为96%的Co^(2+)∶MgAl_(2)O_(4)晶体作为可饱和吸收体,耦合输出镜在1500~1600 nm波段范围的透过率为2.5%,整个微片激光器的腔长为2.7 mm。在注入功率为7.2 W时,激光器成功得到了发射波长为1530 nm、重复频率为127 kHz的稳定线性偏振的脉冲输出,对应的脉冲能量和脉冲宽度分别为1.8μJ和12 ns。Objective With their high sensitivity to Ge and InGaAs and excellent transparency in the atmosphere, eye-safe lasers emitting in the 1.5--1.6 μm spectral range have great application prospects in the lidar, rangefinder, and three-dimensional imaging. Vehicular lidars operating at 1.5 μm have attracted wide attention in the recent development of unmanned aerial vehicles(UAVs). Therefore, high-performance 1.5-μm lasers with high repetition rate, high pulse energy, and narrow pulse duration are commercially valuable. Passively Q-switched lasers operating at 1.5 μm in different gain media, such as Er^(3+)/Yb^(3+) co-doped borated crystals and phosphate, have been often reported. Owing to their high thermal conductivity, high Yb^(3+) → Er^(3+) energy-transfer efficiency, and weak up-conversion loss, Er, Yb∶YAB crystals are considered as an excellent 1.5 μm laser material. However, all previous reports on Er, Yb∶YAB lasers have employed c-cut Er, Yb∶YAB crystals. This paper reports a passively Q-switched microchip laser with an a-cut Er, Yb∶YAB crystal.Methods This paper explores a passively Q-switched microchip laser with an a-cut Er,Yb∶YAB laser crystal as the gain medium.The experimental setup is shown in Fig.2(b).The detailed performance of a laser with an a-cut Er(atomic fraction of 1.5%)∶Yb(atomic fraction of 12%)∶YAB crystal was reported in our previous work.In the present experiment,a Co^(2+)∶MgAl_(2)O_(4) crystal with an initial transmission of 96% at 1.5μm was employed as the saturable absorber.An input mirror and an output coupler were separately coated on the surfaces of two sapphire crystals,which acted as heat sinks in the microchip laser.The input-mirror material was antireflective in the 800--1000 nm range and reflected 99.8% of the light in the 1500--1600 nm range.Meanwhile,the output coupler transmitted 2.5% of the light in the 1500--1600 nm range.The input mirror and output coupler were tightly attached to the surfaces of the Er∶Yb∶YAB and Co^(2+)∶MgAl_(2)O_(4) crystal,r

关 键 词：大气光学 a切Er Yb∶YAl_(3)(BO_(3))4晶体 Co^(2+)∶MgAl_(2)O_(4)晶体 被动调Q 微片激光器 线性偏振 

分 类 号：O437[机械工程—光学工程]