EGU22-1534, updated on 27 Mar 2022
https://doi.org/10.5194/egusphere-egu22-1534
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Multiple-sound-source-excitation quartz-enhanced photoacoustic spectroscopy based on a single-line spot pattern multi-pass cell

Ruyue Cui1,2,3, Hongpeng Wu2,3, Frank K. Tittel4, Lei Dong2,3, and Weidong Chen1
Ruyue Cui et al.
  • 1Laboratoire de Physicochimie de l'Atmosphère, Université du Littoral Côte d'Opale, Dunkerque 59140, France
  • 2State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
  • 3Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
  • 4Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA

Laser-based spectroscopic methods, such as tunable diode laser absorption spectroscopy (TDLAS) [1] and quartz-enhanced photoacoustic spectroscopy (QEPAS) [2], have been developed for trace gas detection, leading to the advent of reliable and robust gas sensors. Among them, QEPAS is an attractive approach characterized by high cost-effectiveness, high sensitivity and small footprint, due to the use of a high Q-factor, low-cost quartz tuning fork (QTF) [3] as acoustic detector [4]. In the traditional single-pass QEPAS, modulated laser beam is focused at the QTF gap and only one acoustic source is generated between the QTF prongs. In the present work, multiple sound-source excitation has been applied to quartz-enhanced photoacoustic spectroscopy (MSSE-QEPAS) by using a single-line spot pattern multi-pass cell (MPC) [5]. The single-line spot pattern MPC is designed to make laser beam passing through the QTF 60 times to produce 60 acoustic sources between the QTF prongs. A signal gain factor of ~ 20 was realized in the MSSE-QEPAS approach with respect to the traditional single-pass QEPAS. A theoretical mode based on convolution method is proposed to modeling the MSSE-QEPAS approach. Highly sensitive QEPAS sensors based on MSSE-QEPAS described in this paper represents high opportunities for applications in atmospheric monitoring, industry process control and medical diagnostics.

 

Acknowledgments : The project is sponsored by National Key R&D Program of China (2019YFE0118200), National Natural Science Foundation of China (NSFC) (62075119, 61805132), Sanjin Scholar (2017QNSJXZ-04) and Shanxi “1331KSC”. Frank K. Tittel acknowledges support by the Robert Welch Foundation (Grant #C0586).

 

References

[1] R. Cui, L. Dong, H. Wu, W. Ma, L. Xiao, S. Jia, W. Chen, and F. K. Tittel, Anal. Chem. 92 (2020) 13034-1304.

[2] H. Wu, L. Dong, H. Zheng, Y. Yu, W. Ma, L. Zhang, W. Yin, L. Xiao, S. Jia, F. K. Tittel, Nat. Commun. 8 (2017) 15331.

[3] T. Wei, A. Zifarelli, S. Dello Russo, H. Wu, G. Menduni, P. Patimisco, A. Sampaolo, V. Spagnolo, L. Dong, Appl. Phys. Rev. 8 (2021) 041409.

[4] P. Patimisco, A. Sampaolo, L. Dong, F. K. Tittel, V. Spagnolo, Appl. Phys. Rev. 5 (2018) 011106.

[5] R. Cui, H. Wu, L. Dong, W. Chen, F. K. Tittel, Appl. Phys. Lett. 118 (2021) 161101.

How to cite: Cui, R., Wu, H., Tittel, F. K., Dong, L., and Chen, W.: Multiple-sound-source-excitation quartz-enhanced photoacoustic spectroscopy based on a single-line spot pattern multi-pass cell, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-1534, https://doi.org/10.5194/egusphere-egu22-1534, 2022.