Spectroscopy and Spectral Analysis, Volume. 32, Issue 10, 2875(2012)
Tunable Diode Laser Absorption Spectroscopy System for Trace Ethylene Detection
Tunable diode laser absorption spectroscopy (TDLAS) was characterized by ultra-narrow line width laser and wavelength modulation, which makes it possible to scan a single absorption line. TDLAS has an advantage in trace gas analysis for its high resolution, high sensitivity and quick response. The 1 626.8 nm absorption line of ethylene was selected for detecting by analyzing its absorption line characteristic. The TDLAS system was developed with a white type multi-pass cell, combined with wavelength modulation and harmonic detection. Ethylene concentration ranges from 20 to 1 200 ppmv were tested using this system. The estimated detection limit of the system is 10 ppmv.
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PAN Wei-dong, ZHANG Jia-wei, DAI Jing-min, SONG Kai. Tunable Diode Laser Absorption Spectroscopy System for Trace Ethylene Detection[J]. Spectroscopy and Spectral Analysis, 2012, 32(10): 2875
Received: Mar. 30, 2012
Accepted: --
Published Online: Nov. 22, 2012
The Author Email: Wei-dong PAN (whispe@163.com)