LD端面泵浦946 nm/473 nm连续Nd：YAG/LBO激光器

Laser diode-end-pumped Nd：YAG/LBO laser operating at 946 nm/473 nm

摘要: 对Nd：YAG 946 nm和 473 nm激光器特性进行了实验研究。采用二极管端面泵浦平-平腔实验结构，使用键合Nd：YAG晶体作为激光增益介质，在入射泵浦功率31.8 W时，得到最高11 W的连续波946 nm 激光输出，光-光转换效率34.6%，斜率效率35.4%，光束质量M2达到7.53，半小时内功率不稳定度小于0.4%。采用Ⅰ类临界相位匹配LBO晶体对946 nm激光进行内腔倍频，获得了0.887 W的连续波473 nm蓝光输出，光-光换转效率5.87%。实验结果表明：所设计的端面泵浦连续激光器具有很强的实用价值。

Abstract: The properties of Nd:YAG 946 nm and 473 nm laser were studied. By using Nd:YAG composite as laser gain medium, 11 W continuous-wave(CW) laser output at 946 nm was obtained under the incident pump power of 31.8 W, corresponding optical efficiency and slope efficiency were 34.6% and 35.4%, respectively. The M2 factor was 7.53 and the power stability was better than 0.4% with 0.5 h. After intra-cavity frequency-doubled by an LBO crystal which was cut for critical type Ⅰ phase matching, 0.887 W CW output power at 473 nm was obtained, corresponding to an optical efficiency of 5.87%. Experimental results prove that the end pumped CW laser has important practical value.