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Quantitative measurements of CO_(2) and CH_(4) using a multipass Raman capillary cell

机译:使用多通道拉曼毛细管池对CO_(2)和CH_(4)进行定量测量

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摘要

Raman measurements of two common gases are made using a simple multipass capillary Raman cell (MCC) coupled to an unfiltered 18 around 1 fiber-optic Raman probe. The MCC, which is fabricated by chemical deposition of silver on the inner walls of a 2 mm inner diameter glass capillary tube, gives up to 20-fold signal enhancements for nonabsorbing gases. The device is relatively small and suitable for remote and in situ Raman measurements with optical fibers. The optical behavior of the MCC is similar to previously described liquid-core waveguides and hollow metal-coated waveguides used for laser transmission, but unlike the former devices, the MCC is generally applicable to a very wide range of nonabsorbing gases.
机译:两种常见气体的拉曼测量是使用简单的多通道毛细管拉曼池(MCC)进行的,该池与未过滤的18周围的1个光纤拉曼探针耦合。通过将银化学沉积在2毫米内径玻璃毛细管的内壁上而制成的MCC,对于不吸收气体的信号增强了20倍。该设备相对较小,适用于使用光纤进行远程和原位拉曼测量。 MCC的光学性能类似于先前描述的用于激光传输的液芯波导和中空金属涂层波导,但是与以前的设备不同,MCC通常适用于非常广泛的非吸收性气体。

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