LD端面泵浦Tm:SrF_(2)电光调Q激光器  

Laser-diode end-pumped electro-optic Q-switched Tm:SrF_(2) laser

作　　者：吴广 张振 王韬[1] 季来林[1] 崔勇[1] 高妍琦[1] 隋展 Wu Guang;Zhang Zhen;Wang Tao;Ji Lailin;Cui Yong;Gao Yanqi;Sui Zhan(Shanghai Institute of Laser Plasma,CAEP,Shanghai 201800,China;Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China)

机构地区：[1]中国工程物理研究院上海激光等离子体研究所,上海201800 [2]中国科学院上海硅酸盐研究所,上海201899

出　　处：《强激光与粒子束》2024年第6期48-53,共6页High Power Laser and Particle Beams

摘　　要：高掺杂浓度的Tm^(3+)增益介质能通过交叉弛豫过程提高激光器的量子效率,但同时也会增加能量上转换带来的损耗,从而限制激光器效率的进一步提升。对Tm:SrF_(2)晶体的荧光特性以及激光性能展开研究。在激光二极管(LD)端面泵浦下,实现最大功率2.99 W的自由运转输出,激光器的泵浦阈值为0.89 W,中心波长1851 nm,斜效率高达82.1%。采用KTP电光调Q开关演示了Tm:SrF_(2)激光器的电光调Q输出特性。在500 Hz重复频率下,获得了1.02 mJ的最大单脉冲能量,泵浦阈值为2.01 W,最短脉冲宽度为45 ns,对应峰值功率为22.67 kW。实验结果表明,基于LD泵浦的Tm:SrF_(2)激光器具有非常高的效率,有望成为中红外光学参量振荡器(OPO)和光学参量放大器(OPA)的理想泵浦源。The Tm^(3+) gain medium with high doping concentration can improve the quantum efficiency of thelaser through the cross relaxation process,but it also increases the energy loss caused by energy up-conversion andlimits the improvement of laser efficiency.The fluorescence characteristics and laser performance of Tm:SrF_(2) crystalare studied.Under laser-diode(LD)end-pumping,a continuous-wave laser with a maximum output power of 2.99 Wand a slope efficiency of up to 82.1%is realized.The pump threshold of the laser is 0.81 W,and the center wavelengthis 1851 nm.Electro-optic Q-switching of the Tm:SrF_(2) laser is demonstrated.At the repetition rate of 500 Hz,amaximum pulse energy of 1.02 mJ and a minimum pulse width of 45 ns are achieved,resulting in a peak power of22.67 kW.The experimental results indicate that the Tm:SrF_(2) laser based on LD pumping has very high efficiency andis expected to be an ideal pump source for optical parametric oscillators(OPOs)and optical parametric amplifiers(OPAs).

关 键 词：激光技术 Tm:SrF_(2)激光器 电光调Q LD端面泵浦 斜效率 

分 类 号：TN248.1[电子电信—物理电子学]