Results 31 to 40 of about 3,545,515 (169)

Quartz-enhanced photoacoustic spectroscopy employing pilot line manufactured custom tuning forks [PDF]

Photoacoustics, 2020
Pilot line manufactured custom quartz tuning forks (QTFs) with a resonance frequency of 28 kHz and a Q value of >30, 000 in a vacuum and ∼ 7500 in the air, were designed and produced for trace gas sensing based on quartz enhanced photoacoustic ...
Huadan Zheng, Yihua Liu, Haoyang Lin, Bin Liu, Xiaohang Gu, Dongquan Li, Bincheng Huang, Yichao Wu, Linpeng Dong, Wenguo Zhu, Jieyuan Tang, Heyuan Guan, Huihui Lu, Yongchun Zhong, Junbin Fang, Yunhan Luo, Jun Zhang, Jianhui Yu, Zhe Chen, Frank K. Tittel   +19 more
doaj   +2 more sources

Simultaneous Detection of Gas Concentration and Light Intensity Based on Dual-Quartz-Enhanced Photoacoustic-Photothermal Spectroscopy

Photonics, 2023
This research proposes a method for the simultaneous acquisition of the second harmonic (2f) signal of quartz-enhanced photoacoustic spectroscopy (QEPAS) and the first harmonic (1f) signal of quartz-enhanced photothermal spectroscopy (QEPTS) based on the
Hao Liu, Xiang Chen, Lu Yao, Zhenyu Xu, Mai Hu, Ruifeng Kan   +5 more
doaj   +2 more sources

Quartz-Enhanced Photoacoustic Spectroscopy in the Terahertz Spectral Range

Photonics, 2023
Infrared laser photo-acoustic spectroscopy provides very high sensitivity of a gas sample analysis when high-power tunable laser radiation sources and resonant photo-acoustic detectors (PADs) are used.
Alexey P. Votintsev, Alexey V. Borisov, Didar R. Makashev, Mariya Y. Stoyanova, Yury V. Kistenev   +4 more
doaj   +3 more sources

Mid-infrared intracavity quartz-enhanced photoacoustic spectroscopy with pptv – Level sensitivity using a T-shaped custom tuning fork [PDF]

Photoacoustics, 2022
Resonant optical power buildup inside a high finesse cavity is exploited to boost the sensitivity in quartz-enhanced photoacoustic spectroscopy (QEPAS) for CO, N2O and H2O detection, operating at a wavelength of 4.59 µm.
Jakob Hayden, Marilena Giglio, Angelo Sampaolo, Vincenzo Spagnolo, Bernhard Lendl   +4 more
doaj   +2 more sources

Commercial and Custom Quartz Tuning Forks for Quartz Enhanced Photoacoustic Spectroscopy: Stability under Humidity Variation [PDF]

Sensors, 2023
This work investigates the behavior of commercial and custom Quartz tuning forkss (QTF) under humidity variations. The QTFs were placed inside a humidity chamber and the parameters were studied with a setup to record the resonance frequency and quality ...
Diba Ayache, Roman Rousseau, Elena Kniazeva, Julien Charensol, Tarek Seoudi, Michael Bahriz, Fares Gouzi, Vincenzo Spagnolo, Aurore Vicet   +8 more
doaj   +2 more sources

Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy

Light: Science & Applications
The extension of dual-comb spectroscopy (DCS) to all wavelengths of light along with its ability to provide ultra-large dynamic range and ultra-high spectral resolution, renders it extremely useful for a diverse array of applications in physics ...
Jiapeng Wang, Hongpeng Wu, Angelo Sampaolo, Pietro Patimisco, Vincenzo Spagnolo, Suotang Jia, Lei Dong   +6 more
doaj   +4 more sources

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
core   +4 more sources

Single-tube on-beam quartz-enhanced photoacoustic spectroscopy

Optics Letters, 2016
Quartz-enhanced photoacoustic spectroscopy (QEPAS) with a single-tube acoustic microresonator (AmR) inserted between the prongs of a custom quartz tuning fork (QTF) was developed, investigated, and optimized experimentally. Due to the high acoustic coupling efficiency between the AmR and the QTF, the single-tube on-beam QEPAS spectrophone configuration
Zheng, Huadan, Dong, Lei, Sampaolo, Angelo, Wu, Hongpeng, Patimisco, Pietro, Yin, Xukun, Ma, Weiguang, Zhang, Lei, Yin, Wangbao, SPAGNOLO, Vincenzo Luigi, Jia, Suotang, Tittel, Frank K.   +11 more
core   +7 more sources

Tuning forks with optimized geometries for quartz-enhanced photoacoustic spectroscopy [PDF]

Optics Express, 2019
We report on the design, realization, and performance of novel quartz tuning forks (QTFs) optimized for quartz-enhanced photoacoustic spectroscopy (QEPAS). Starting from a QTF geometry designed to provide a fundamental flexural in-plane vibrational mode resonance frequency of ~16 kHz, with a quality factor of 15,000 at atmospheric pressure, two novel ...
Pietro Patimisco, Angelo Sampaolo, Marilena Giglio, Stefano dello Russo, Verena Mackowiak, Hubert Rossmadl, Alex Cable, Frank K. Tittel, Vincenzo Spagnolo   +8 more
core   +5 more sources

Beat frequency quartz-enhanced photoacoustic spectroscopy for fast and calibration-free continuous trace-gas monitoring [PDF]

Nature Communications, 2017
Quartz-enhanced photoacoustic spectroscopy is a sensitive gas detection method whereby radiation-induced sound waves from gas absorption are detected. Here, Wuet al. use the beat frequency between a modulated laser and a tuning fork resonance to increase
Hongpeng Wu, Lei Dong, Huadan Zheng, Yajun Yu, Weiguang Ma, Lei Zhang, Wangbao Yin, Liantuan Xiao, Suotang Jia, Frank K. Tittel   +9 more
doaj   +2 more sources