Parts-per-billion-level detection of hydrogen sulfide based on doubly resonant photoacoustic spectroscopy with line-locking

被引：24

作者：

Zhang, Hui ^{[1
,2
]}

Wang, Zhen ^{[3
,4
,5
]}

Wang, Qiang ^{[1
,2
]}

Borri, Simone ^{[4
,5
]}

Galli, Iacopo ^{[4
,5
]}

Sampaolo, Angelo ^{[6
]}

Patimisco, Pietro ^{[6
]}

Spagnolo, Vincenzo Luigi ^{[6
]}

De Natale, Paolo ^{[4
,5
]}

Ren, Wei ^{[3
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun 130033, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Univ Hong Kong, Dept Mech & Automat Engn, Hong Kong, Peoples R China

[4] CNR INO Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy

[5] LENS European Lab Nonlinear Spect, I-50019 Sesto Fiorentino, Italy

[6] Univ & Politecn Bari, Dipartimento Interateneo Fis, PolySense Lab, Via Amendola 173, Bari, Italy

来源：

PHOTOACOUSTICS | 2023年 / 29卷

基金：

中国国家自然科学基金;

关键词：

Photoacoustic spectroscopy; Cavity-enhanced spectroscopy; Hydrogen sulfide; Trace gas detection; Molecular absorption line locking; H2S GAS SENSOR; CAVITY;

D O I：

10.1016/j.pacs.2022.100436

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

We report on the development of a highly sensitive hydrogen sulfide (H2S) gas sensor exploiting the doubly resonant photoacoustic spectroscopy technique and using a near-infrared laser emitting at 1578.128 nm. By targeting the R(4) transition of H2S, we achieved a minimum detection limit of 10 part per billion in concen-tration and a normalized noise equivalent absorption coefficient of 8.9 x 10(-12) W cm(-1) Hz(-1/2). A laser-cavity-molecule locking strategy is proposed to enhance the sensor stability for fast measurement when dealing with external disturbances. A comparison among the state-of-the-art H2S sensors using various spectroscopic tech-niques confirmed the record sensitivity achieved in this work.

引用

页数：8

共 28 条

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