Acta Photonica Sinica, Volume. 52, Issue 3, 0352122(2023)

High Sensitive Detection of Trace Gas Based on Photoacoustic Spectroscopy via a Hammer-shaped Quartz Tuning Fork

Zheng CHEN1,2, Bo SUN1,2, Lei DONG1,2, and Hongpeng WU1,2、*
Author Affiliations
  • 1State Key Laboratory of Quantum Optics and Optical Quantum Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
  • 2Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
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    Figures & Tables(9)
    Schematic diagram and physical diagram of hammer tuning fork
    Frequency response curve of the hammer-shaped tuning fork at atmospheric pressure
    Schematic of the C2H2 QEPAS sensor
    The picture of the acoustic detection module
    QEPAS signals obtained at different laser focal point locations
    Optimization of the length of the resonator tubes
    C2H2-QEPAS signal amplitude with different modulation depth
    The second harmonic signal of 30 ppm C2H2 and the noise signal obtained in nitrogen background
    • Table 1. Parameters comparison of different tuning forks

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      Table 1. Parameters comparison of different tuning forks

      Tuning fork typeResonance frequency/HzQuality factorEquivalent resistance value/kΩ
      QTF132 759.613 69094.6
      QTF215 841.915 710162.8
      QTF312 459.615 540157.5
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    Zheng CHEN, Bo SUN, Lei DONG, Hongpeng WU. High Sensitive Detection of Trace Gas Based on Photoacoustic Spectroscopy via a Hammer-shaped Quartz Tuning Fork[J]. Acta Photonica Sinica, 2023, 52(3): 0352122

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    Paper Information

    Category: Special Issue for Frontiers and Techniques of Laser Spectroscopy

    Received: Dec. 12, 2022

    Accepted: Feb. 13, 2023

    Published Online: Jun. 21, 2023

    The Author Email: WU Hongpeng (wuhp@sxu.edu.cn)

    DOI:10.3788/gzxb20235203.0352122

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