湿度和SF<sub>6</sub>在石英增强光声光谱中对CO分子弛豫率的影响

卫婷婷; 武红鹏; 尹旭坤; 董磊

doi:10.3788/OPE.20182608.1870

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湿度和SF₆在石英增强光声光谱中对CO分子弛豫率的影响

激光光谱技术 | 更新时间：2020-08-13

- 湿度和SF₆在石英增强光声光谱中对CO分子弛豫率的影响
- Impact of humidity and SF₆ on CO detection based on quartz-enhanced photoacoustic spectroscopy
- 光学精密工程 2018年26卷第8期页码：1870-1875
- 作者机构：
  
  1.山西大学激光光谱研究所量子光学与光量子器件国家重点实验室, 山西太原 030006
  2.山西大学极端光学协同创新中心, 山西太原 030006
- 作者简介：
  
  [ "卫婷婷(1996-), 女, 山西运城人, 2017年于太原科技大学获得学士学位, 主要从事石英增强光声光谱技术方面的研究。E-mail:waitingonce@163.com" ]
  董磊(1979-), 男, 河南新乡人, 教授, 博士生导师, 2002年、2007年于山西大学分别获得学士、博士学位, 主要从事光声光谱痕量气体检测的研究。E-mail:donglei@sxu.edu.cn DONG Lei, E-mail:donglei@sxu.edu.cn
- 基金信息：
  
  国家自然科学基金资助项目(61622503);国家自然科学基金资助项目(61575113);山西省"1331工程"重点学科建设计划经费资助项目;山西省中青年拔尖创新人才支持计划资助项目;山西省"三晋学者"特聘教授支持计划资助项目(2017QNSJXZ-04)
- DOI：10.3788/OPE.20182608.1870
  中图分类号： O433.1
- 收稿日期：2018-04-24，
  
  录用日期：2018-5-29，
  
  纸质出版日期：2018-08-25
- 稿件说明：
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卫婷婷, 武红鹏, 尹旭坤, 等. 湿度和SF₆在石英增强光声光谱中对CO分子弛豫率的影响[J]. 光学精密工程, 2018,26(8):1870-1875.

Ting-ting WEI, Hong-peng WU, Xu-kun YIN, et al. Impact of humidity and SF₆ on CO detection based on quartz-enhanced photoacoustic spectroscopy[J]. Optics and precision engineering, 2018, 26(8): 1870-1875.
卫婷婷, 武红鹏, 尹旭坤, 等. 湿度和SF₆在石英增强光声光谱中对CO分子弛豫率的影响[J]. 光学精密工程, 2018,26(8):1870-1875. DOI： 10.3788/OPE.20182608.1870.

Ting-ting WEI, Hong-peng WU, Xu-kun YIN, et al. Impact of humidity and SF₆ on CO detection based on quartz-enhanced photoacoustic spectroscopy[J]. Optics and precision engineering, 2018, 26(8): 1870-1875. DOI： 10.3788/OPE.20182608.1870.

摘要

为了研究六氟化硫（SF

）气体分子和水汽（H

O）对一氧化碳（CO）气体分子的弛豫率的影响，建立了一个基于石英增强光声光谱（QEPAS）技术的痕量气体传感器系统。采用1.57

m的近红外分布式反馈二极管激光器作为激励光源，并对不同SF

和H

O气体浓度下的CO的光声信号进行对比研究。首先用CO传感器系统探测CO与N

的气体混合物中CO的光声信号，然后在CO与N

气体混合物中加入不同浓度的SF

气体，分别探测不同浓度SF

气体下的CO光声信号强度。最后在CO与N2的气体混合物中加入不同浓度H

O，探测加入H

O后的CO的光声信号强度。实验结果表明随着CO和N

气体混合物中SF

气体浓度的增加，CO的光声信号幅值几乎没有变化，而在混合物中加入2.5%的H

O后，发现CO的光声信号提高了约5倍。因此，SF

对CO气体的弛豫率没有明显的影响，然而H

O的添加能够有效缩短CO气体的弛豫时间。

Abstract

A CO sensor system based on quartz-enhanced photoacoustic spectroscopy technology was established to study the effect of sulfur hexafluoride (SF

) and water vapor (H

O) on the relaxation rate of carbon monoxide (CO) gas molecules. A 1.57

m near-infrared distributed feedback diode laser was used as the light source to compare the photoacoustic signal amplitudes of CO under different concentrations of SF

and H

O. First

a CO sensor system was used to detect photoacoustic signals from CO in a gas mixture of CO and N

. Then

different concentrations of SF

gas were added to the CO and N

gas mixture and the photoacoustic signal amplitudes of CO were detected. Finally

O was added to the gas mixture of CO and N

before detecting the photoacoustic signal amplitudes of CO. The experimental results show that with increasing concentration of SF

in the gas mixture of CO and SF

the photoacoustic signal of CO remains constant; however

the addition of 2.5% H

O to the mixture results in a five-fold increase of the photoacoustic signal of CO. Therefore

O has an obvious effect on the relaxation rate of CO gas

while SF

has none.

关键词

Keywords

references

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湿度和SF6在石英增强光声光谱中对CO分子弛豫率的影响

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DOI：10.3788/OPE.20182608.1870

摘要

Abstract

关键词

Keywords

references

湿度和SF₆在石英增强光声光谱中对CO分子弛豫率的影响

Impact of humidity and SF₆ on CO detection based on quartz-enhanced photoacoustic spectroscopy