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Particle identification by laser-induced incandescence in a solid-state laser cavity

机译:在固态激光腔中通过激光诱导的白炽光识别颗粒

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摘要

The laser-induced incandescence of a particle of unknown size and composition can be detected simultaneously with the light elastically scattered by the particle, providing information on both the size and composition of the particle. The technique relies on vaporization of the particle; detection of the incandescence signal at the time of vaporization allows determination of the boiling point of the particle, which can in turn be related to the composition of the particle. The elastically scattered signal provides information about the size of the particle and confirmation that it was vaporized. The technique is demonstrated by directing particles through a Nd:YAG laser cavity with ~10~(6) W/cm~(2) of circulating intensity. Elements such as tungsten, silicon, and graphite, as well as common aerosols such as soot, can be detected and identified.
机译:可以同时检测未知大小和组成的粒子的激光诱导白炽灯,并同时检测被粒子弹性散射的光,从而提供有关粒子的大小和成分的信息。该技术依赖于颗粒的汽化。在汽化时对白炽信号的检测可以确定颗粒的沸点,这又可以与颗粒的组成有关。弹性散射的信号提供有关颗粒大小的信息并确认其已蒸发。通过将粒子引导到循环强度约为10〜(6)W / cm〜(2)的Nd:YAG激光腔中来证明该技术。可以检测和识别诸如钨,硅和石墨等元素,以及诸如烟灰之类的常见气溶胶。

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    《Applied optics》 |2003年第19期|共11页
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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;
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