| Original Articles |
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High Resolution and High Sensitivity Measurement of Methane at 1.51μm |
| DENG Lun-Hua1,2;GAO Xiao-Ming1,2;CAO Zhen-Song1,2;ZHAO Wei-Xiong2;ZHANG Wei-Jun2 |
| 1Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031
2Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031 |
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| Cite this article: |
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DENG Lun-Hua, GAO Xiao-Ming, CAO Zhen-Song et al 2006 Chin. Phys. Lett. 23 2415-2417 |
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Abstract The high-resolution absorption spectrum of CH4 at 1.51μm is observed by direct absorption spectroscopy technique with a White absorption cell. Multi-peak fitting technique is adopted to reveal line positions and line intensities of CH4 from 6608cm-1 to 6625cm-1. Special attention is paid on the determination of the line positions, and the accuracy is better than ±0.002cm-1. A minimum measurable absorption of 2.1×10-8 (3σ) has been achieved based on the measured direct absorption spectroscopy.
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| Keywords:
33.20.Ea
33.20.Vq
33.70.Fd
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Published: 01 September 2006
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| PACS: |
33.20.Ea
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(Infrared spectra)
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33.20.Vq
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(Vibration-rotation analysis)
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33.70.Fd
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(Absolute and relative line and band intensities)
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Abstract
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