| 光谱学与光谱分析 |
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| 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 |
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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.
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Received: 2010-05-10
Accepted: 2010-08-20
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Corresponding Authors:
HU Shui-ming
E-mail: smhu@ustc.edu.cn
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