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由LD抽运Nd-YLF固体激光器输出的单纵模调Q激光脉冲,脉宽约为85ns,经过快速LiNbO3电光偏转器实现时空变换,用狭缝削取脉宽约为1ns的超短激光脉冲。导出激光束通过偏转器后扫描光线长度与加到偏转器上的快速电压脉冲变化率关系,并在实验中分别用MOS管和雪崩管高压电脉冲发生器取代价格昂贵的冷阴极管高压电脉冲发生器,获得激光脉冲宽度压缩约两个量级,且实现激光脉冲宽度可调。
Single-mode Q-switched laser pulses output by LD pumping Nd-YLF solid-state lasers with a pulse width of about 85 ns are spatially and temporally transformed by a fast LiNbO3 electro-optic deflector, and the ultrashort laser pulse with a pulse width of about 1 ns is slit with a slit . The relationship between the length of the scanned beam after the laser beam passes through the deflector and the rate of change of the fast voltage pulse applied to the deflector is derived. In the experiments, MOS tube and avalanche tube high voltage pulse generator are respectively used to replace the expensive cold cathode tube high voltage Electric pulse generator, obtained laser pulse width compression of about two orders of magnitude, and to achieve adjustable laser pulse width.