Mid-infrared dissolved CO2 measurement system using the ultra-compact multipass cell

被引：2

作者：

Chen, Hongda ^{[1
]}

Chen, Chen ^{[1
]}

Dong, Weihao ^{[1
]}

Li, Yongyang ^{[1
]}

Zhang, Mengru ^{[1
]}

机构：

[1] Jilin Univ, Coll Instrumentat & Elect Engn, Minist Educ China, Key Lab Geophys Explorat Equipment, Changchun 130026, Peoples R China

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2023年 / 65卷 / 05期

基金：

中国国家自然科学基金;

关键词：

1f+3f WMS; fast response time; limit of detection; multipass cell; multiplexing multiple spectral lines; SPECTROSCOPY;

D O I：

10.1002/mop.33450

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

To measure natural gas hydrate, a mid-infrared dissolved CO2 measurement system is designed using the tunable diode laser spectroscopy with ultra-compact multipass cell. The QCL laser of 4319 nm has a scanning range from 2315.05 to 2315.40 cm(-1), which contains (CO2)-C-12 and (CO2)-C-13 for isotope measurement and wide range of concentration detection. The optimized 3f + 1f wavelength modulation method reduces the limit of detection to 7.1 ppbv. An ultra-compact multi-pass cell with effective optical path length of 6.3 m and small volume of 15 ml is designed to achieve the system response time of 40 s. The dissolved CO2 sensing system has been used in deep sea natural gas hydrate detection.

引用

页码：1319 / 1323

页数：5

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