Quartz-Enhanced Photoacoustic Spectroscopy Based on the Four-Off-Beam Acoustic Micro-Resonator

被引：13

作者：

Wang, Zongliang ^{[1
]}

Zhang, Qinduan ^{[2
,3
]}

Chang, Jun ^{[2
,3
]}

Tian, Cunwei ^{[1
]}

Tang, Longfei ^{[1
]}

Feng, Yiwen ^{[2
,3
]}

Zhang, Hao ^{[1
]}

Zhang, Xiukun ^{[1
]}

机构：

[1] Liaocheng Univ, Sch Phys Sci & Informat Technol, Liaocheng 252000, Shandong, Peoples R China

[2] Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Peoples R China

[3] Shandong Univ, Shandong Prov Key Lab Laser Technol & Applicat, Jinan 250100, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2020年 / 38卷 / 18期

基金：

中国国家自然科学基金;

关键词：

Laser beams; Gas lasers; Acoustics; Absorption; Quantum cascade lasers; Spectroscopy; Fiber lasers; Acoustic micro-resonator; quartz-enhanced photoacoustic spectroscopy; off-beam; fiber gas sensor;

D O I：

10.1109/JLT.2020.2998848

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：

A four-off-beam acoustic micro-resonator (AmR) structure is proposed to improve the photoacoustic signal intensity in quartz-enhanced photoacoustic spectroscopy (QEPAS) for trace gas sensing. Two vertical-array-based double-off-beam AmR structures are arranged on each side of the quartz tuning fork (QTF) horizontally to construct a four-off-beam AmR structure using a rectangular prism. This QEPAS scheme based on the four-off-beam AmR is evaluated in the water-vapor detection of air at normal atmospheric pressure and room temperature (27C). Comparing with the bare QTF scheme, the new QEPAS configuration enhances the photoacoustic spectroscopy signal by a factor of 25.84 times, achieving a minimum detection limit of 278 ppbv with a normalized noise equivalent absorption coefficient of 1.27 10(9) WHz(12) in water vapour detection at a wavelength of 1368.597 nm.

引用

页码：5212 / 5218

页数：7

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