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Chin. Opt. Lett.
 Home  List of Issues    Issue 10 , Vol. 16 , 2018    10.3788/COL201816.103001


Qualitative and quantitative analysis of atmospheric methanol using a continuous-wave terahertz spectrometer
Han Zhang1;2, Zhaohui Zhang2;3, Xiaoyan Zhao3, Xiaotong Zhang1, Tianyao Zhang3, Can Cao3, and Yang Yu3
1 School of Computer and Communication Engineering, [University of Science and Technology Beijing], Beijing 1 00083, China
2 [Beijing Engineering Research Center of Industrial Spectrum Imaging], Beijing 100083, China
3 School of Automation and Electrical Engineering, [University of Science and Technology Beijing], Beijing 100083 , China

Chin. Opt. Lett., 2018, 16(10): pp.103001

DOI:10.3788/COL201816.103001
Topic:Spectroscopy
Keywords(OCIS Code): 300.6495  300.6390  300.1030  010.1120  

Abstract
We present a specific-window method to subtract the interference of water vapor on terahertz frequency-domain spectroscopy (THz-FDS) at ambient temperature and pressure. A continuous-wave spectrometer based on photomixing was utilized to obtain THz-FDS of methanol vapor in the range of 50–1200 GHz. The distinctly spaced absorption features in the neighborhood of atmospheric windows of transparency were selected to perform linear fitting versus the calculated absorption cross section and obtain the concentration of methanol. Furthermore, the gradually decreased methanol vapor was quantified to demonstrate the reliability of the method.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2018/7/9
Accepted:2018/8/30
Posted online:2018/9/20

Get Citation: Han Zhang, Zhaohui Zhang, Xiaoyan Zhao, Xiaotong Zhang, Tianyao Zhang, Can Cao, and Yang Yu, "Qualitative and quantitative analysis of atmospheric methanol using a continuous-wave terahertz spectrometer," Chin. Opt. Lett. 16(10), 103001(2018)

Note: This work was supported by the China Postdoctoral Science Foundation (No. 2017M610771).



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