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
收藏
页码：5212 / 5218
页数：7
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