Author:
Wang Fei ,Huang Qun-Xing ,Li Ning ,Yan Jian-Hua ,Chi Yong ,Cen Ke-Fa ,
Abstract
Tunable diode laser absorption spectroscopy (TDLAS) with wavelength modulation is used to measure the NH3 concentration at normal temperature and pressure near 1531.7nm in near-infrared region. The concentration of 25ppm can be obtained by 10m long-path cell，and concentration from 25ppm to 400ppm has good linear relationship with 2f signal. The effect of particles on 2f signal is discussed in this paper，and a solution of the problem using laser intensity linear fit to make the concentration measurement immune to particle disturbance is suggested.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Cited by
14 articles.
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