scholarly journals Ultra-high sensitive acetylene detection using quartz-enhanced photoacoustic spectroscopy with a fiber amplified diode laser and a 30.72 kHz quartz tuning fork

2017 ◽  
Vol 110 (3) ◽  
pp. 031107 ◽  
Author(s):  
Yufei Ma ◽  
Ying He ◽  
Ligong Zhang ◽  
Xin Yu ◽  
Jingbo Zhang ◽  
...  
Keyword(s):  
Diode Laser ◽  
Photoacoustic Spectroscopy ◽  
Tuning Fork ◽  
Quartz Tuning Fork

Photoacoustic spectroscopy telemetry of airport dangerous goods

2019 ◽  
Vol 33 (02) ◽  
pp. 1950007
Author(s):  
Zhouqiang Zhang ◽  
Shuhai Jia ◽  
Guangshen Xu ◽  
Yabin Cao
Keyword(s):  
Absorption Coefficient ◽  
Diode Laser ◽  
Infrared Absorption ◽  
Photoacoustic Spectroscopy ◽  
Near Infrared ◽  
Tuning Fork ◽  
Laser Light ◽  
Quartz Tuning Fork ◽  
Dangerous Goods ◽  
Future Work

A novel photoacoustic spectroscopy telemetry method of detecting trace acetylene gas using a quartz tuning fork is reported. A 1532-nm CW-DFB, fiber-coupled diode laser with power of 12 mW was used as the excitation source while an astronomical telescope was used to collect laser light scattered on the surface of the detected object at a distance of 6 m and the photoacoustic spectroscopy of acetylene was performed. The detection results are consistent with the standard near-infrared absorption coefficient of acetylene. This study provides a new direction for research in photoacoustic spectroscopy telemetry. Future work will quantitatively analyze acetylene gas.

scholarly journals Application of Micro Quartz Tuning Fork in Trace Gas Sensing by Use of Quartz-Enhanced Photoacoustic Spectroscopy

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5240 ◽  
Author(s):  
Haoyang Lin ◽  
Zhao Huang ◽  
Ruifeng Kan ◽  
Huadan Zheng ◽  
Yihua Liu ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Tuning Fork ◽  
Gas Sensing ◽  
Modulation Depth ◽  
Quartz Tuning Fork ◽  
Acoustic Resonance ◽  
Photoacoustic Signal ◽  
Integration Time ◽  
Sampling Volume ◽  
Qepas Sensor

A novel quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a micro quartz tuning fork (QTF) is reported. As a photoacoustic transducer, a novel micro QTF was 3.7 times smaller than the usually used standard QTF, resulting in a gas sampling volume of ~0.1 mm3. As a proof of concept, water vapor in the air was detected by using 1.39 μm distributed feedback (DFB) laser. A detailed analysis of the performance of a QEPAS sensor based on the micro QTF was performed by detecting atmosphere H2O. The laser focus position and the laser modulation depth were optimized to improve the QEPAS excitation efficiency. A pair of acoustic micro resonators (AmRs) was assembled with the micro QTF in an on-beam configuration to enhance the photoacoustic signal. The AmRs geometry was optimized to amplify the acoustic resonance. With a 1 s integration time, a normalized noise equivalent absorption coefficient (NNEA) of 1.97 × 10−8 W·cm−1·Hz−1/2 was achieved when detecting H2O at less than 1 atm.

scholarly journals Quartz-Enhanced Photoacoustic Spectroscopy Sensor with a Small-Gap Quartz Tuning Fork

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2047 ◽  
Author(s):  
Yu-Fei Ma ◽  
Yao Tong ◽  
Ying He ◽  
Jin-Hu Long ◽  
Xin Yu
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Tuning Fork ◽  
Quartz Tuning Fork

scholarly journals Quartz Enhanced Photoacoustic Spectroscopy Based Gas Sensor with a Custom Quartz Tuning Fork

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 735
Author(s):  
Maxime Duquesnoy ◽  
Guillaume Aoust ◽  
Jean-Michel Melkonian ◽  
Raphaël Lévy ◽  
Myriam Raybaut ◽  
...  
Keyword(s):  
Quality Factor ◽  
Penetration Depth ◽  
Gas Sensor ◽  
Photoacoustic Spectroscopy ◽  
Atmospheric Pressure ◽  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Atmospheric Conditions ◽  
Co2 Detection ◽  
Inner Diameter

We have fabricated a custom quartz tuning fork (QTF) with a reduced fundamental frequency, a larger gap between the prongs and the best quality factor in air at atmospheric conditions ever reported. Acoustic microresonators have been added to the QTF, these were optimized through experiments. We demonstrate a normalized noise equivalent absorption of 3.7 × 10−9 W·cm−1·Hz−1/2 for CO2 detection at atmospheric pressure. Influence of the inner diameter and length of the microresonators has been studied as well as the penetration depth between the QTF prongs.

scholarly journals Quartz Enhanced Photoacoustic Spectroscopy Based on a Custom Quartz Tuning Fork

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1362 ◽  
Author(s):  
Maxime Duquesnoy ◽  
Guillaume Aoust ◽  
Jean-Michel Melkonian ◽  
Raphaël Lévy ◽  
Myriam Raybaut ◽  
...  
Keyword(s):  
Quality Factor ◽  
Penetration Depth ◽  
Photoacoustic Spectroscopy ◽  
Atmospheric Pressure ◽  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Allan Deviation ◽  
Atmospheric Conditions ◽  
Co2 Detection ◽  
Inner Diameter

We have designed and fabricated a custom quartz tuning fork (QTF) with a reduced fundamental frequency; a larger gap between the prongs; and the best quality factor in air at atmospheric conditions ever reported, to our knowledge. Acoustic microresonators have been added to the QTF in order to enhance the sensor sensitivity. We demonstrate a normalized noise equivalent absorption (NNEA) of 3.7 × 10−9 W.cm−1.Hz−1/2 for CO2 detection at atmospheric pressure. The influence of the inner diameter and length of the microresonators has been studied, as well as the penetration depth between the QTF’s prongs. We investigated the acoustic isolation of our system and measured the Allan deviation of the sensor.

scholarly journals Monolithic Double Resonator for Quartz Enhanced Photoacoustic Spectroscopy

2021 ◽  
Vol 11 (5) ◽  
pp. 2094
Author(s):  
Roman Rousseau ◽  
Diba Ayache ◽  
Nicolas Maurin ◽  
Wioletta Trzpil ◽  
Michael Bahriz ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Distributed Feedback ◽  
Acoustic Excitation ◽  
Distributed Feedback Laser ◽  
Water Vapor Absorption ◽  
New Approach ◽  
Vapor Absorption ◽  
Printing Techniques

A new approach for Quartz Enhanced Photoacoustic Spectroscopy is presented, based on an acoustic excitation from the outside of the prongs of a quartz tuning fork, to increase the sensitivity of the sensor. For this purpose, we introduce a monolithic acoustic double-resonator (double-mR) in a T-shape configuration, using 3D printing. It was modelized and experimentally characterized using a 1392 nm distributed feedback laser diode, targeting a water vapor absorption line. The setup showed a two-factor enhancement of the signal, compared to a classical off-beam QEPAS approach and confirmed the strong interest of photolithographic printing techniques for acoustic developments.

scholarly journals Quartz tuning fork embedded off-beam quartz-enhanced photoacoustic spectroscopy

2019 ◽  
Vol 44 (10) ◽  
pp. 2562 ◽  
Author(s):  
Lien Hu ◽  
Chuantao Zheng ◽  
Jie Zheng ◽  
Yiding Wang ◽  
Frank K. Tittel
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Tuning Fork ◽  
Quartz Tuning Fork
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