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High-Sensitivity Detection of Water Vapor Concentration: Optimization and Performance

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Journal of Russian Laser Research Aims and scope

We demonstrate a trace gas sensor to measure the water vapor (H2O) concentration based on quartzenhanced photoacoustic spectroscopy (QEPAS). Here, the wavelength-modulation spectroscopy (WMS) with the second-harmonic detection is utilized. We add two metallic tubes acting as a microresonator (mR) to the quartz tuning fork (QTF) sensor design to improve the sensor signal level. After optimization of the mR dimensions and laser modulation depth, we obtain a minimum detection limit (MDL) of 5.73 ppm.

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Authors and Affiliations

  1. School of Science, Xijing University, Xi’an, 710123, China

    Hongtao Dang, Yufei Ma, Yu Li & Shaosong Wan

  2. National Key Laboratory of Science and Technology on Tunable Lasers Harbin Institute of Technology, Harbin, 150001, China

    Yufei Ma

Authors
  1. Hongtao Dang
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  2. Yufei Ma
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  3. Yu Li
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  4. Shaosong Wan
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Correspondence to Yufei Ma.

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Dang, H., Ma, Y., Li, Y. et al. High-Sensitivity Detection of Water Vapor Concentration: Optimization and Performance. J Russ Laser Res 39, 95–97 (2018). https://doi.org/10.1007/s10946-018-9694-4

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  • DOI: https://doi.org/10.1007/s10946-018-9694-4

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