基于Nd∶YAG/Cr∶YAG/YAG键合晶体LD侧面泵浦激光器

利用Nd∶YAG/Cr∶YAG/YAG键合晶体，建立了具有高平均输出功率的LD侧面泵浦被动调Q激光器系统.当Cr∶YAG的初始透过率为85%、最大泵浦光功率为187.5 W时，1 064 nm激光的平均输出功率为83.68 W.通过KTP晶体进行倍频，在最大泵浦光功率下，产生了27.2 W 532 nm绿光激光脉冲，同时脉冲宽度和重复频率分别为210 ns和21.2 kHz; 绿光单脉冲能量和峰值功率分别为1.28 mJ和6.1 kW; 泵浦光(808 nm)到倍频光(532 nm)的光-光效率为14.5%.

Abstract

A high average power passively Q-switched LD side-pumped laser system at 1 064 nm was set up by using Nd∶YAG/Cr∶YAG/YAG composite crystal. With 85% initial transmission of Cr∶YAG, the average output power of 1 064 nm was measured. Under the maximum pump power of 187.5 W, the maximum average output power of 83.68 W at 1 064 nm was obtained. By frequency doubling the 1 064 nm laser output in a KTP nonlinear crystal, 27.2 W green laser pulses at 532 nm with the corresponding pulse width of 210 ns and the repetition rate of 21.2 kHz were produced under the maximum pump power. The green laser single-pulse energy was 1.28 mJ and the peak power was 6.1 kW. And the optical-to-optical conversion efficiency of pump light to frequency-doubling light was 14.5%.

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江炜, 何青, 陈振强, 朱思祁, 陈在俊, 王苏娥, 陈雨娇, 尹浩. 基于Nd∶YAG/Cr∶YAG/YAG键合晶体LD侧面泵浦激光器[J]. 光子学报, 2014, 43(4): 0414002. JIANG Wei, HE Qing, CHEN Zhen-qiang, ZHU Si-qi, CHEN Zai-jun, WANG Su-e, CHEN Yu-jiao, YIN Hao. LD Side-pumped Laser Based on Nd∶YAG/Cr∶YAG/YAG Composite Crystal[J]. ACTA PHOTONICA SINICA, 2014, 43(4): 0414002.

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