A Very Sensitive CW Cavity Ring-Down Spectrometer and Its Application
SONG Ke-feng, GAO Bo, LIU An-wen, WANG Na, HU Shui-ming*
Department of Chemical Physics, University of Science and Technology of China, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei 230026, China
Abstract：A cavity ring-down spectrometer was built up using a CW tunable Ti: sapphire laser. The experiments show that not only the spectral resolution is up to the 10-4 cm-1 level, but the detecting sensitivity also exceeds 10-10 cm-1. With the measurements of the absorption spectroscopy of C2H2 near 12 696.4 cm-1, the quantitative capability of the instrument was demonstrated. Through the spectroscopy of the samples mixed with trace C2H2 in N2 gas, the detection limit of C2H2 was determined to be 0.2 ppm.
Key words：Cavity ring down;Ro-vibration spectroscopy;Trace detection;C2H2
宋科峰，高 波，刘安雯，王 娜，胡水明*. 高灵敏的连续激光光腔衰荡光谱仪及其应用[J]. 光谱学与光谱分析, 2011, 31(03): 835-838.
SONG Ke-feng, GAO Bo, LIU An-wen, WANG Na, HU Shui-ming* . A Very Sensitive CW Cavity Ring-Down Spectrometer and Its Application. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(03): 835-838.
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