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基于可饱和吸收体和被动调Q微晶片种子源,对双通掠入射Nd:YVO_4板条放大器进行了实验研究。脉冲宽度为90ps、脉冲重复频率为100kHz、光束质量因子为1.16的激光作为种子源,功率从100μW到10mW可调,分别采用新型的液态金属和传统的薄铟膜作为板条放大器的热传导材料。测量结果显示,采用液态金属能大幅降低板条抽运面的温度。将液态金属作为板条放大器的导热材料,10mW的种子光源在抽运功率为55 W时,经过掠入射Nd:YVO_4板条双通放大,最终获得13 W激光输出,光光效率达到23%,脉冲峰值功率为1.2 MW,脉冲能量为130μJ,光束质量M2x=1.30,M2y=1.28。
Based on the saturable absorber and passive Q-switched microchip seed source, a two-pass grazing incidence Nd: YVO_4 slab amplifier was experimentally studied. Pulse width of 90ps, the pulse repetition frequency of 100kHz, the beam quality factor of 1.16 laser as a seed source, adjustable power from 100μW to 10mW, respectively, using a new type of liquid metal and the traditional thin indium film as a slab amplifier heat conduction material. The measurement results show that the use of liquid metal can significantly reduce the slab pumping surface temperature. The liquid metal is used as the heat conduction material of the slat amplifier. The 10 mW seed light source is double-pass grazing incidence Nd: YVO_4 slab at pumping power of 55 W, finally obtaining 13 W laser output, the light efficiency reaches 23% Pulse peak power of 1.2 MW, pulse energy of 130μJ, beam quality M2x = 1.30, M2y = 1.28.