光谱学与光谱分析 |
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Experimental Study on Harmonic Detection of Methane by Use of a Digital Lock-In Amplifier |
DONG Lei, MA Wei-guang, YIN Wang-bao, LI Chang-yong, JIA Suo-tang |
College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China |
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Abstract The harmonic detection of methane at 6 105.369 4 cm-1 was measured by use of a digital lock-in amplifier (SR830) remotely controlled by a computer. The programme was written by Visual Basic 6.0 because it has strong function and a friendly appearance. The experimental results are in agreement with theoretical analysis, which fully confirms that a better signal-to-noise ratio (SNR) can be achieved in the high-harmonics detection of trace gases by the digital lock-in amplifier. The method can be applicable to the highly sensitive detection of pollution gases.
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Received: 2003-09-12
Accepted: 2004-02-10
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Corresponding Authors:
DONG Lei
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Cite this article: |
DONG Lei,MA Wei-guang,YIN Wang-bao, et al. Experimental Study on Harmonic Detection of Methane by Use of a Digital Lock-In Amplifier [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(03): 473-476.
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URL: |
https://www.gpxygpfx.com/EN/Y2005/V25/I03/473 |
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