36 W侧面抽运腔内倍频Nd:YAG/KTP连续绿光激光器

通过优化平-凹-平三镜折叠腔结构设计，利用大功率半导体激光器侧面抽运、Ⅱ类相位匹配KTP晶体腔内倍频，获得高效高功率连续绿色激光输出.当抽运电流约为36 A时，得到最高36.6 W的连续绿光激光输出，对应的光—光转换效率为8.71％.在输出功率33 W时测量激光功率稳定性，其功率不稳定度为0.27%.用刀口法测量了激光器高输出功率时的光束质量，光束质量因子小于8.对高功率抽运情况下三镜折叠腔的像散补偿、失调灵敏度和基模在腔内分布情况做了数值模拟.关键词：侧面抽运腔内倍频连续波

A 36 W intracavity-frequency-doubled diode-side-pumped Nd:YAG/KTP continuous wave green laser

High-power and high efficiency continuous wave green laser has been realized by optimizing the plane-concave-plane resonator of three mirrors in an laser diode side-pumped configuration and KTP of Ⅱ-type phase-matching for frequency doubling. A maximum of 36.6 W continuous wave 532 nm green laser is obtained at pumping current of 36 A, corresponding to optical-to-optical conversion efficiency of 8.71％. The power stability of the laser is measured at output power of 33 W. During a half hour measurement time, the output power instability is 0.27%. The beam transfer factor is less than 8 measured by knife-edge method at output power of 33 W. Astigmatism compensation, misalignment sensitivity and mode profile inside resonator of three mirror folded resonator are also numerically simulated under high pump power.