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研究了激光二极管(LD)侧向抽运的Nd∶YAG陶瓷电光调Q激光器的激光输出特性。该激光器采用九组激光二极管线阵列(LDA)侧面紧密环绕均匀排布的抽运结构,并用微通道热汇冷却技术冷却。在电光调Q方式下,重复频率为100 Hz,抽运单脉冲能量为416 mJ时,用尺寸为5 mm×75 mm,掺杂原子数分数为1%的Nd∶YAG陶瓷棒,获得50 mJ的1064 nm激光输出,脉冲宽度为12 ns,斜率效率达24%。并实验测量和分析了偏振片,KD*P晶体,四分之一波片等调Q器件的插入损耗。测量了输出激光时间波形和光斑的光强空间分布。
The laser output characteristics of a Nd: YAG ceramic electro-optical Q-switched laser which is laterally pumped by a laser diode (LD) are studied. The laser uses nine laser diode linear array (LDA) side closely packed around the pumping structure, and microchannel heat sink cooling technology. In the electro-optic Q-switched mode, the repetition frequency is 100 Hz and the pumping single-pulse energy is 416 mJ. The Nd: YAG ceramic rod with the size of 5 mm × 75 mm and doping 1% atomic number obtains 50 mJ The 1064 nm laser output has a pulse width of 12 ns and a slope efficiency of 24%. The insertion loss of Q-switched devices such as polarizer, KD * P crystal and quarter-wave plate were experimentally measured and analyzed. The output laser time waveform and spot intensity distribution were measured.