LD泵浦Nd:YAG 946 nm/1 064 nm双波长运转及腔内和频

LD-pumped Nd:YAG 946 nm/1 064 nm laser dual-wavelength operation and intracavity sum-frequency mixing

摘要: 用国产半导体激光二极管（LD）端面泵浦Nd:YAG晶体, 通过优化激光谐振腔反射膜系，调节1 064 nm谱线的线性损耗以达到与弱谱线946 nm的增益匹配，在室温下实现1 064 nm和946 nm双波长连续运转，并通过I类临界相位匹配LBO晶体腔内和频在国内首次实现500.8 nm青色激光连续输出。当泵浦注入功率为1.4W时和频青色激光最大输出达20 mW，光-光转换效率为1.4%，功率稳定性24 h内优于±3%。

Abstract: An LD-pumped Nd:YAG laser that generates simultaneous laser action at the wavelengths 1 064 nm and 946 nm by optimizing film design is presented. An optimized CW 593.5 nm yellow laser at room temperature was obtained for the first time. Using type-I critical phase-matching LBO crystal, 500.8 nm laser was obtained by 1 064 nm and 946 nm intracavity sum-frequency mixing for the first time. The maximum laser output power of 20 mW was obtained when an incident pump laser of 14 W was used. The optical-to-optical conversion was up to 1.4% and the power instability in 24 h was better than ±3%.