红外与激光工程, 2018, 47 (1): 0105003, 网络出版: 2018-01-30   

脉冲LD泵浦千赫兹1.57 μm全固态激光器

Pulse LD pumped kilohertz 1.57 μm solid-state laser
作者单位
1 沈阳理工大学 理学院, 辽宁 沈阳 110159
2 鞍山紫玉激光科技有限公司, 辽宁 鞍山 114000
摘要
采用非稳腔光参量振荡(OPO)研制了千赫兹重复频率人眼安全波段全固态激光器。激光器采用电光调Q方式、脉冲激光二极管(LD)侧面泵浦Nd:YAG激光晶体实现了高光束质量的1.064 μm基频激光。光参量振荡部分采用Ⅱ类非临界相位匹配KTP晶体, 为了获得较好的光束质量, OPO谐振腔采用平凸非稳定谐振腔结构, 实现了千赫兹重频、窄脉冲1.57 μm波段激光输出。在脉冲激光二极管泵浦电流为125 A、电光调Q重复频率为1 kHz时, 1.57 μm激光输出最大平均功率达到了4.67 W, 激光脉冲宽度为4.3 ns, 功率不稳定度为3%, 激光泵浦阈值约为45 A。
Abstract
The eye-safe kilohertz repetition rate solid-state laser was developed by using the OPO of unstable resonator. Using pulse LD side-pumping Nd:YAG laser crystal and electro-optical Q-switched techniques, the laser achieved high beam quality of 1.064 μm fundamental frequency light. The II type noncritical phase-matching KTP crystal was adopted in optical parametric oscillation. In order to get high beam quality, the OPO cavity made use of plane-convex unstable resonator structure. The laser system could operate stably at the wavelength of kilohertz repetition rate 1.57 μm. When the pumping current of LD was 125 A and the electro-optical Q-switched repetition rate was 1 kHz, the maximum average output power of 1.57 μm laser was 4.67 W and the pulse width of the output laser was 4.3 ns, the power instability of 1.57 μm was 3%. The laser pumping threshold was about 45 A.

岱钦, 崔建丰, 李业秋, 张善春, 李漫, 乌日娜, 姚俊. 脉冲LD泵浦千赫兹1.57 μm全固态激光器[J]. 红外与激光工程, 2018, 47(1): 0105003. Dai Qin, Cui Jianfeng, Li Yeqiu, Zhang Shanchun, Li Man, Wu Rina, Yao Jun. Pulse LD pumped kilohertz 1.57 μm solid-state laser[J]. Infrared and Laser Engineering, 2018, 47(1): 0105003.

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