【摘要】 报道了绿光平均功率达138 W的声光调Q内腔倍频全固态Nd∶YAG绿光激光器。为了进一步提高绿光激光器的输出功率以及压窄脉宽,通过倍频晶体相位匹配角随温度变化的分析以及腔型的研究,设计并优化了U型谐振腔。实验中采用两个聚光腔,每个聚光腔由35个20 W的高功率激光二极管(LD)侧面抽运Nd∶YAG棒,利用Ⅱ类相位匹配KTP晶体腔内倍频,实现了高平均功率内腔倍频激光器的稳定运转。在两个聚光腔的激光二极管抽运电流分别为18.5 A,20.5 A时,获得了重复频率为10 kHz,脉冲宽度优于49 ns,输出功率为138 W的高功率、高重复频率、窄脉宽绿光(532 nm)输出,光-光转换效率为14.1%,不稳定度为±2.8%。更多还原

【Abstract】 An average power of 138 W green beam operation by intracavity frequency doubling of acousto-optic Q-switch solid-state Nd∶YAG laser is reported.An U type resonator is designed and optimized in order to compress pulse-width and increase the average power.Two Nd∶YAG rods were employed and a type Ⅱ phase matched KTP crystal(=25°,θ=90° under the condition of(24 ℃,) the size is(7 mm)×(7 mm)×(7 mm)) was applied for frequency doubling.Under the pumping currents of(18.5 A) and(20.5 A,) a maximum green power of(138 W) was generated at (10 kHz) repetition rate and(49 ns) pulse-width,leading to(14.1%) of optical-optical conversion efficiency and(±2.8%) instability.更多还原