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Wavelength modulation spectroscopy-digital detection of gas absorption harmonics based on Fourier analysis

机译:波长调制光谱法-基于傅立叶分析的气体吸收谐波数字检测

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摘要

This work presents a detailed study of the theoretical aspects of the Fourier analysis method, which has been utilized for gas absorption harmonic detection in wavelength modulation spectroscopy (WMS). The lock-in detection of the harmonic signal is accomplished by studying the phase term of the inverse Fourier transform of the Fourier spectrum that corresponds to the harmonic signal. The mathematics and the corresponding simulation results are given for each procedure when applying the Fourier analysis method. The present work provides a detailed view of the WMS technique when applying the Fourier analysis method. (c) 2015 Optical Society of America
机译:这项工作对傅立叶分析方法的理论方面进行了详细的研究,该方法已用于波长调制光谱(WMS)中的气体吸收谐波检测。通过研究与谐波信号相对应的傅立叶频谱的傅立叶逆变换的相位项,可以实现谐波信号的锁定检测。应用傅里叶分析方法时,针对每个过程给出了数学和相应的仿真结果。当前的工作提供了应用傅里叶分析方法时WMS技术的详细视图。 (c)2015年美国眼镜学会

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