紧凑型激光二极管抽运全固态355 nm连续波紫外激光器

报道了一台激光二极管端面抽运Nd:YVO₄晶体内腔三倍频355 nm激光连续输出的全固态紫外激光器.激光腔采用紧凑型简单凹平直腔，腔长仅为70 mm.利用两块LBO晶体进行腔内倍频、和频，当注入抽运功率为2527 W时，获得最大功率为306 mW的355 nm连续波输出，光光转换效率为012％，输出功率短期不稳定性为53%，355 nm激光输出光束质量良好.通过采用内腔倍频技术和设计合理的腔参数，实现了中小功率连续输出的全固态紫外激光器的小型化、便携化，进一步拓宽了紫外激光器 关键词： 激光二极管端面抽运 内腔三倍频 连续波 355 nm激光

Compact laser diode end-pumped Nd:YAG intracavity frequency-tripled quasi-continuous 355 nm laser

A diode-end-pumped Nd:YVO₄ intracavity frequency-tripled continuous-wave 355 nm laser has been demonstrated. The laser cavity is the simple concave-to-plane linear cavity, which is short and compact. The laser cavity length is only 70 mm. The efficient second and third-harmonic waves are generated by two lithium triborate （LBO） crystals successfully. The 355 nm laser output power is 306 mW at a pump power of 2527 W with an optical-to-optical efficiency of 012% and the corresponding beam quality is satisfactory. The instability of the output power of 274 mW is less than 53%. By using the technology of intracavity frequency conversion and choosing the proper parameters in cavity design, the miniaturization and handiness of the all-solid-state continuous-wave ultraviolet lasers with the relatively low output powers are improved greatly, which will broaden the application fields of the ultraviolet lasers.