采用双激光二极管阵列(LDA)侧面交错抽运Nd:YAG晶体,通过电光调Q的方式获得1064 nm动态脉冲激光输出。这种抽运结构可以使晶体内的增益场与谐振腔基模实现良好的匹配,易于得到良好的光束质量和大能量输出。抽运源采用峰值功率为100 W的准连续LDA,采用直接贴近抽运的方式,KD*P晶体作为电光Q开关。并应用高斯光束传输的ABCD定律,计算了谐振腔稳区范围,给出了较为合理的谐振腔参数。所设计的激光器在重复频率20 Hz,抽运能量1200 mJ时,获得了最大输出能量151 mJ,脉宽8.48 ns的1064 nm动态激光输出,光光转换效率为12.6%。

Double laser diode array (LDA) alternate symmetric side-pumped Nd:YAG laser is developed.The 1064 nm dynamic-laser output has been obtained by electro-optic (E-O) Q-switch.The perfect matching of gain field inside of the crystal and fundamental mode of cavity can be made by this structure,and high beam quality,high power output and high extraction efficiency can be easily obtained.The pumping source is the LD array which the peak power of one module is 100 W,and a direct close-pumping configuration and KD*P crystasal as E-O Q-switch are used for the laser in the experiment chooses.By using the ABCD propagation law of Gaussian beams,the stability-area of resonant cavity is calculated and the more reasonable parameters of resonant cavity are offered.When the repetition frequency is 20 Hz and the pumping energy is 1200 mJ,the 1064 nm dynamic-laser output with 151 mJ output energy and 8.48 ns pulse width is obtained,and the conversion efficiency of light-light is 12.6%.