A cavity-enhanced Raman spectroscopy (CERS) gas-sensing method is introduced. Using optical feedback frequency-locking, laser radiation provided by a diode laser is coupled into a three-mirror V-shaped optical cavity. An intracavity laser power of 92 W is realized, yielding a power gain factor of 2200. Raman spectrums of air, carbon dioxide, and acetylene are recorded as a demonstration. Multicomponent gas mixtures including isotopic gases can be simultaneously sensed by CERS. With 200 s exposure time, detection limits of 5.35 Pa for N2, 5.07 Pa for O2, 1.74 Pa for CO2, and 0.58 Pa for C2H2 are achieved. CERS is a powerful gas-sensing method with high selectivity and sensitivity, which also has the potential for quantitative analysis of gases with high accuracy.

中文翻译：

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具有光学反馈锁频功能的腔增强拉曼光谱仪，用于气体检测。

介绍了一种腔增强拉曼光谱（CERS）气敏方法。使用光反馈锁频，将二极管激光器提供的激光辐射耦合到三镜V形光学腔中。实现了92 W的腔内激光功率，产生了2200的功率增益系数。记录了空气，二氧化碳和乙炔的拉曼光谱作为演示。CERS可以同时感测包括同位素气体在内的多组分气体混合物。在200 s的曝光时间下，N2的检出限为5.35 Pa，O2的检出限为5.07 Pa，CO2的检出限为1.74 Pa，C2H2的检出限为0.58 Pa。CERS是一种功能强大的气体传感方法，具有很高的选择性和灵敏度，也具有对气体进行高精度定量分析的潜力。