Results 141 to 150 of about 3,931 (172)

Photoacoustic spectroscopy detection based on complementary interdigital cantilever enhanced Fabry-Perot acoustic sensor. [PDF]

Photoacoustics
Yan C, Wang Q, Li T, Gao Z, Chen Y, Zhu Z, Li Z, Hou D, Liu Q.   +8 more
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Enhancing photoacoustic trace gas detection via a CNN-transformer denoising framework. [PDF]

Photoacoustics
Zhang C, Gao Y, Cui R, Zhang H, Tian J, Tang Y, Yang L, Feng C, Patimisco P, Sampaolo A, Spagnolo V, Yin X, Dong L, Wu H.   +13 more
europepmc   +1 more source

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Radial-cavity quartz-enhanced photoacoustic spectroscopy

Optics Letters, 2021
Radial-cavity quartz-enhanced photoacoustic spectroscopy (RC-QEPAS) was proposed for trace gas analysis. A radial cavity with (0,0,1) resonance mode was coupled with the quartz tuning fork (QTF) to greatly enhance the QEPAS signal and facilitate the optical alignment.
Haohua Lv, Huadan Zheng, Yihua Liu, Zhifei Yang, Qian Wu, Haoyang Lin, Baiyang Antonio Zhou Montano, Wenguo Zhu, Jianhui Yu, Ruifeng Kan, Zhe Chen, Frank K. Tittel   +11 more
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Helmholtz-resonator quartz-enhanced photoacoustic spectroscopy

Optics Letters, 2023
In this work, Helmholtz-resonator quartz-enhanced photoacoustic spectroscopy (HR-QEPAS) was developed for trace gas sensing. A pair of Helmholtz resonators with high-order resonance frequency was designed and coupled with a quartz tuning fork (QTF).
Huijian Luo, Chenglong Wang, Haoyang Lin, Qian Wu, Zhifei Yang, Wenguo Zhu, Yongchun Zhong, Ruifeng Kan, Jianhui Yu, Huadan Zheng   +9 more
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Differential quartz-enhanced photoacoustic spectroscopy

Applied Physics Letters, 2023
In this paper, a differential quartz-enhanced photoacoustic spectroscopy (D-QEPAS) sensor is reported. The differential photoacoustic cell (PAC) was used to generate the photoacoustic effect. Two quartz tuning forks (QTFs) with a quality factor (Q) up to 10 000 were used as the acoustic wave transducers. The signal of D-QEPAS sensor was doubly enhanced
Chu Zhang, Shunda Qiao, Ying He, Sheng Zhou, Lei Qi, Yufei Ma   +5 more
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Off-beam quartz-enhanced photoacoustic spectroscopy

Optics Letters, 2009
An off-beam (OB) detection approach is suggested and experimentally investigated and optimized for quartz-enhanced photoacoustic spectroscopy (QEPAS). This OB-QEPAS configuration, very simple in assembly, not only allows for use of larger excitation optical beams and facilitating optical alignment but also provides higher enhancement of photoacoustic ...
Kun, Liu, Xiaoyong, Guo, Hongming, Yi, Weidong, Chen, Weijun, Zhang, Xiaoming, Gao   +5 more
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Non-contact quartz-enhanced photoacoustic spectroscopy

Applied Physics Letters, 2023
Non-contact quartz-enhanced photoacoustic spectroscopy (NC-QEPAS) was proposed and developed for trace gas analysis. The NC-QEPAS aims at solving the problem that the quartz tuning fork (QTF) must be immersed in the gases for photoacoustic wave transducing, which limits its application for corrosive and dusty gas sensing.
Haoyang Lin, Chenglong Wang, Leqing Lin, Minshuai Wang, Wenguo Zhu, Yongchun Zhong, Jianhui Yu, Frank Tittel, Huadan Zheng   +8 more
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In-plane quartz-enhanced photoacoustic spectroscopy

Applied Physics Letters, 2020
An optical gas sensing technique based on in-plane quartz-enhanced photoacoustic spectroscopy (IP-QEPAS) is reported. In IP-QEPAS, the laser beam is aligned in the plane of the quartz tuning fork (QTF) to increase the interaction area between the acoustic wavefront and the QTF.
Yufei Ma, Shunda Qiao, Pietro Patimisco, Angelo Sampaolo, Yao Wang, Frank K. Tittel, Vincenzo Spagnolo   +6 more
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