Compact mid-infrared trace gas detection system based on TDLAS and ICL

Chun-guang LI; Lei DONG; Yi-ding WANG; Jun LIN

doi:10.3788/OPE.20182608.1855

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Compact mid-infrared trace gas detection system based on TDLAS and ICL

Laser Spectroscopy | 更新时间：2020-08-13

- Compact mid-infrared trace gas detection system based on TDLAS and ICL
- Optics and Precision Engineering Vol. 26, Issue 8, Pages: 1855-1861(2018)
- 作者机构：
  
  1.吉林大学仪器科学与电气工程学院, 吉林长春 130061
  2.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
  3.吉林大学电子科学与工程学院集成光电子学国家重点联合实验室, 吉林长春 130012
  4.吉林大学生物与农业工程学院, 吉林长春 130022
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20182608.1855
  CLC： O657.38
- Received：23 April 2018，
  
  Accepted：29 May 2018，
  
  Published：25 August 2018
- 稿件说明：
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Chun-guang LI, Lei DONG, Yi-ding WANG, et al. Compact mid-infrared trace gas detection system based on TDLAS and ICL[J]. Optics and precision engineering, 2018, 26(8): 1855-1861.
DOI：

Chun-guang LI, Lei DONG, Yi-ding WANG, et al. Compact mid-infrared trace gas detection system based on TDLAS and ICL[J]. Optics and precision engineering, 2018, 26(8): 1855-1861. DOI： 10.3788/OPE.20182608.1855.

摘要

为了实现基于可调谐激光吸收光谱技术的高检测灵敏度、低功耗、小型中红外痕量气体传感器设计，结合锑化镓（GaSb）ICL和紧凑型多反射气体吸收气室（MPC）研制了基于不同结构传感光学核的两个小型TDLAS传感系统。两个传感光学核的总功率消耗为3.7 W，并通过探测甲烷（CH

）和甲醛（CH

O）分别验证了双层结构和单层结构系统的性能。实验结果表明：CH

和CH

O系统的检测灵敏度分别为5.0 nL/L和3.0 nL/L，测量精度分别为1.4 nL/L和1.0 nL/L。此外，相同配置情况下将两种结构系统应用于甲、乙烷（C

）同步检测，通过对校园环境中甲、乙烷进行连续66 h的监测试验，验证了设计的紧凑型中红外痕量气体检测系统能够稳定有效地工作，基本满足目前民用气体测量的稳定可靠、精度高、抗干扰能力强等要求。

Abstract

Two compact Tunable Diode Laser Absorption Spectroscopy (TDLAS) sensor systems were developed based on different structural optical cores. The two optical cores combine two recent developments; gallium antimonide (GaSb)-based ICL and a compact multipass gas cell (MPC)

with the aim of developing a compact TDLAS-based sensor for mid-IR gas detection with high detection sensitivity and low power consumption. The two-floor structure sensor was used for methane (CH

) measurements and the single-floor structure sensor was used for formaldehyde (CH

O) concentration measurements

with the two optical sensor cores consuming 3.7 W of power. Detection limits of~5 nL/L and~3 nL/L with measurement precisions of~1.4 nL/L and~1 nL/L were achieved for CH

and CH

O concentration measurements

respectively. In addition

the two-structure system was used for CH

and C

detection under the same conditions over a period of 66 h campus. The results show that the sensors worked steadily and effectively. They can satisfy the system requirements of non-contact

online

real-time

high-precision

and rapid signal acquisition

as well as strong anti-jamming and high stability.

关键词

Keywords

references

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