| Original Articles |
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Highly Sensitive Tunable Diode Laser Absorption Spectroscopy of CO2 Around 1.57μm |
| SHAO Jie1,2;GAO Xiao-Ming1,2;ZHANG Wei-Jun2;YUAN Yi-Qian1;YANG Yong2;PEI Shi-Xin2 |
| 1Laboratory of Atmospheric Optics of Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031
2Environmental Spectroscopy Laboratory of Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031 |
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| Cite this article: |
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SHAO Jie, GAO Xiao-Ming, ZHANG Wei-Jun et al 2005 Chin. Phys. Lett. 22 57-60 |
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Abstract he absolute absorption spectrum intensities of carbon dioxide samples has been recorded with a tunable diode laser spectrometer in the spectral range 6350--6364cm-1, which is suitable for the in-situ sensing of carbon dioxide in the lower stratosphere studied using a commercial telecommunication-type diode laser. It was found that the typical uncertainty of experimental line intensities is about 1% compared with the values listed in the HITRAN database, which are calculated by direct numerical diagonalization. The intensity of the weakest line we detected in this experiment is 1.116×10-26cm-1/(molecule.cm-2) at the pressure of 0.5 Torr, and the corresponding absorption is 3.2×10-6 with SNR of 4.53.
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| Keywords:
25.20.Dc
42.68.Ca
78.20.Ci
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Published: 01 January 2005
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| PACS: |
25.20.Dc
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(Photon absorption and scattering)
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42.68.Ca
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(Spectral absorption by atmospheric gases)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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