Cantilever-enhanced dual-comb photoacoustic spectroscopy

被引：6

作者：

Wang, Jiapeng ^{[1
,2
]}

Wu, Hongpeng ^{[1
,2
]}

Liu, Xiaoli ^{[1
,2
]}

Wang, Gang ^{[1
,2
]}

Wang, Yong ^{[1
,2
]}

Feng, Chaofan ^{[1
,2
]}

Cui, Ruyue ^{[1
,2
,3
]}

Gong, Zhenfeng ^{[4
]}

Dong, Lei ^{[1
,2
]}

机构：

[1] Shanxi Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China

[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China

[3] Univ Littoral Cote dOpale, Lab Physicochim Atmosphere, F-59140 Dunkerque, France

[4] Dalian Univ Technol, Sch Optoelect Esssngineering & Instrumentat Sci, Dalian 116024, Liaoning, Peoples R China

来源：

PHOTOACOUSTICS | 2024年 / 38卷

基金：

中国国家自然科学基金;

关键词：

Photoacoustic spectroscopy; Dual -comb spectroscopy; Optical cantilever; Gas sensing; FREQUENCY COMB;

D O I：

10.1016/j.pacs.2024.100605

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Dual-comb photoacoustic spectroscopy (DC-PAS) advances spectral measurements by offering high-sensitivity and compact size in a wavelength-independent manner. Here, we present a novel cantilever-enhanced DC-PAS scheme, employing a high-sensitivity fiber-optic acoustic sensor based on an optical cantilever and a nonresonant photoacoustic cell (PAC) featuring a flat-response characteristic. The dual comb is down-converted to the audio frequency range, and the resulting multiheterodyne sound waves from the photoacoustic effect, are mapped into the response frequency region of the optical cantilever microphone. This cantilever-enhanced DC-PAS method provides advantages such as high sensitivity, compact design, and immunity to electromagnetic interference. Through 10 seconds averaging time, the proposed approach experimentally achieved a minimum detection limit of 860 ppb for acetylene. This technology presents outstanding opportunities for highly sensitive detection of trace gases in a wavelength-independent manner, all within a compact volume.

引用

页数：8

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