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Diagnosis of Multiple Gases Separated from Transformer Oil Using Cavity-Enhanced Raman Spectroscopy |
| LI Xiao-Yun1, XIA Yu-Xing1, HUANG Ju-Ming2, ZHAN Li1 |
| 1Department of Physics, Shanghai Jiao Tong University, Shanghai 2002402Shanghai Zhongyi Industrial Control Tech. Co., Ltd., Shanghai 200023 |
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LI Xiao-Yun, XIA Yu-Xing, HUANG Ju-Ming et al 2008 Chin. Phys. Lett. 25 3326-3329 |
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Abstract The Raman signal of gas molecules is very weak due to its small scattering cross section. Here, a near-confocal cavity-enhanced Raman detection system is demonstrated. In the cavity, a high power light of 9W is achieved by using a cw 200mW 532nm laser, which greatly enhances the detection sensitivity of gas species. A photomultiplier tube connected to a spectrometer is used as the detection system. The Raman spectra of the mixed gases separated from transformer oil has been observed. The relationship of absolute Raman intensity and gas pressure is also obtained. To our knowledge, this is the first Raman system to detect the gases separated from transformer oil.
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52.25.Tx
33.20.Fb
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Received: 12 May 2008
Published: 29 August 2008
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| PACS: |
52.25.Tx
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(Emission, absorption, and scattering of particles)
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33.20.Fb
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(Raman and Rayleigh spectra (including optical scattering) ?)
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