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A Q-Swicthed All-Solid-State Single-Longitudinal-Mode Laser with Adjustable Pulse-Width and High Repetition Rate 下载免费PDF全文
A single-longitudinal-mode (SLM) laser-diode pumped Nd: YAG laser with adjustable pulse width is developed by using the techniques of pre-lasing and changing polarization of birefingent crystal The Q-switching voltage is triggered by the peak of the pre-lasing pulse to achieve the higher stability of output pulse energy. The output energy of more than I mJ is obtained with output energy stability of 3% (rms) at lOO Hz. The pulsewidth can be adjusted from 30ns to 300ns by changing the Q-switching voltage. The probability of putting out single-longitudinal-mode pulses is almost 100%. The laser can be run over four hours continually without mode hopping. 相似文献
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我们采用国际上推荐的标准方法对MgF_2光学增透膜激光损伤的测量结果。 单横模YAG激光振荡器输出的激光束经二级YAG激光放大器放大后,由一消像差的非球面透镜会聚至样品上。样品安置在一个可作x,y,z移动的精密样品架上。这不仅可在实验中方便地移动样品,而且可以用刀口扫描法精确地测量样品处的光斑大小。He-Ne激光调整得与YAG主激光束共轴同线,除了可用它来调试整个光学系统外,尚可用它来作为显微镜观察时的照明光源,以便进行仔细地损伤诊断。 相似文献
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利用时空变换获得超短激光脉冲 总被引:1,自引:1,他引:0
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。 相似文献
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