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首页> 外文期刊>Review of Scientific Instruments >Note: Cavity enhanced self-absorption spectroscopy: A new diagnostic tool for light emitting matter
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Note: Cavity enhanced self-absorption spectroscopy: A new diagnostic tool for light emitting matter

机译：注意：腔增强自吸收光谱：一种用于发光物质的新诊断工具

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摘要

We introduce the concept of Cavity Enhanced Self-Absorption Spectroscopy (CESAS), a new sensitive diagnostic tool for analyzing light-emitting samples. The technique works without an additional light source and its implementation is straight forward. In CESAS, a sample (plasma, flame, or combustion source) is located in an optically stable cavity consisting of two high reflectivity mirrors, and here it acts both as light source and absorbing medium. A modest portion of the emitted light is trapped inside the cavity, making 104–105 cavity round trips while crossing the sample and an artificial augmentation of the path length of the absorbing medium occurs as the light transverses the cavity. Light leaking out of the cavity simultaneously provides emission and absorption features. The performance is illustrated by CESAS results on supersonically expanding pulsed hydrocarbon plasma. We expect CESAS to become a generally applicable analytical tool for real time and in situ diagnostics.
机译：我们介绍了腔增强自吸收光谱（CESAS）的概念，它是一种用于分析发光样品的新型灵敏诊断工具。该技术无需额外的光源即可工作，并且实现起来很简单。在CESAS中，样品（等离子，火焰或燃烧源）位于由两个高反射率镜组成的光学稳定腔中，在这里它既充当光源又充当吸收介质。少量的发射光被捕获在腔体内，使10 4 –10 5 腔在穿过样品时往返移动，并人为地增加了光路长度光线横穿空腔时会发生吸收介质。从腔中泄漏出的光同时提供发射和吸收功能。 CESAS在超声扩展脉冲烃等离子体上的结果说明了该性能。我们希望CESAS成为实时和现场诊断的通用分析工具。

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