Abstract Raman spectroscopy is a powerful method for gas sensing but is limited by the inherently weak Raman effect. Due to the increase in intracavity laser power or improvement in spontaneous emission, cavity-enhanced technology is a useful enhancement method for the improvement of the limits of detection, which permits Raman spectroscopy to get better applications in gas sensing. In this article, a brief review of several cavity-enhanced technologies used in gas sensing by Raman spectroscopy is presented, the enhanced-cavities including multiple-pass cavities, Fabry–Perot cavities, laser cavities, and microcavities. Finally, the advantages and limitations of these different technologies are discussed.

中文翻译：

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腔增强拉曼光谱作为气体传感方法的综述

摘要 拉曼光谱是一种强大的气体传感方法，但受到其固有的弱拉曼效应的限制。由于腔内激光功率的增加或自发发射的改善，腔增强技术是一种有用的提高检测限的增强方法，这使得拉曼光谱在气体传感中得到更好的应用。在本文中，简要回顾了拉曼光谱用于气体传感的几种腔增强技术，增强腔包括多通腔、法布里-珀罗腔、激光腔和微腔。最后，讨论了这些不同技术的优点和局限性。