[Experimental study on harmonic detection of methane by use of a digital lock-in amplifier].

作者信息

Dong Lei, MA Wei-Guang, Yin Wang-Bao, Li Chang-yong, Jia Suo-tang

机构信息

College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Mar;25(3):473-6.

PMID:16013337

Abstract

The harmonic detection of methane at 6105.3694 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.

摘要