典型文献
Reconstruction and fitting of second-harmonic signals by wavelength modulation spectroscopy method based on fast Fourier transform
文献摘要：
Conventional wavelength modulation spectroscopy[WMS]is vulnerable to the influence of low-frequency noise.Accuracy of the method highly depends on the performance of the costly lock-in amplifier.In this article,we report a new and effective method for reconstructing second-harmonic signals through WMS based on fast Fourier transform[FFT].This method is less disturbed by low-frequency noise because it does not use a low-frequency ramp wave.Formulation and detection procedures were presented.The discrete second-harmonic waveform can be obtained by continuously changing the DC signal and FFT analysis in this method.Second-harmonic waveforms acquired by the two means are generally consistent.The experimental study validates the obtained gas concentration from 5％to 30％,showing a good linear relationship by the proposed method.The maximum relative error on concentration extraction is 2.87％;as for conventional WMS,this value is 4.50％.The developed measurement method may have potential in computed tomography.
文献关键词：
中图分类号：
作者姓名：
Linquan Lai;Yue Chen;Kongtao Chen;Jiale Tang;Kaiwen Yin;Fuqiang Jia;Dun Qiao;Yuanlong Fan;Kang Li;Nigel Copner
作者机构：
Fujian Key Laboratory of Ultrafast Laser Technology and Applications,School of Electronic Science and Technology,Xiamen University,Xiamen 361005,China;Wireless&Optoelectronics Research&Innovation Centre,Faculty of Computing,Engineering&Science,University of South Wales,Wales CF371DL,UK
文献出处：
引用格式：
[1]Linquan Lai;Yue Chen;Kongtao Chen;Jiale Tang;Kaiwen Yin;Fuqiang Jia;Dun Qiao;Yuanlong Fan;Kang Li;Nigel Copner-.Reconstruction and fitting of second-harmonic signals by wavelength modulation spectroscopy method based on fast Fourier transform)[J].中国光学快报（英文版）,2022(09):68-72
A类：
B类：
Reconstruction,fitting,second,harmonic,signals,by,wavelength,modulation,spectroscopy,method,fast,Fourier,transform,Conventional,WMS,vulnerable,influence,low,frequency,noise,Accuracy,highly,depends,performance,costly,lock,amplifier,In,this,article,report,new,effective,reconstructing,through,FFT,This,less,disturbed,because,does,not,ramp,Formulation,detection,procedures,were,presented,discrete,can,obtained,continuously,changing,DC,analysis,Second,waveforms,acquired,two,means,are,generally,consistent,experimental,study,validates,gas,concentration,from,showing,good,linear,relationship,proposed,maximum,relative,error,extraction,conventional,value,developed,measurement,may,have,potential,computed,tomography
AB值：
0.599327
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