Ms. Leqing Lin’s research is centered on advanced optical and photoacoustic gas-sensing technologies, with a strong emphasis on developing ultra-sensitive, compact, and real-time detection systems for environmental and industrial applications. Her work spans quartz-enhanced photoacoustic spectroscopy (QEPAS), conductance spectroscopy, hybrid conductance-photoacoustic approaches, and distributed-feedback (DFB) laser–based sensing, enabling precise detection of gases such as CO, CO₂, H₂, hydrocarbons, water vapor, and humidity at extremely low concentrations. She has made notable contributions to multi-species gas analysis by integrating acoustic and electrical detection pathways, greatly improving speed, selectivity, and sensitivity. Ms. Lin’s innovations include cost-effective hydrogen sensors based on quartz crystal tuning forks, non-contact QEPAS architectures, clamp-type tuning-fork–enhanced systems, and miniature multipass optical cells featuring novel beam-shaping designs. Her studies also extend into unconventional sensing enhancements, such as spider-silk-assisted conductance spectroscopy for improved humidity detection in medical masks. Committed to sensor miniaturization and robust field deployment, she designs compact, low-power architectures suitable for portable, wearable, or embedded platforms. Recent breakthroughs—such as her 2.3 μm DFB-laser CO sensor using MPC-LITES for real-time cigarette-smoke monitoring and a ppb-level CO₂ sensor using an eight-petaled spot-pattern multipass cell—highlight her focus on high-impact, practical gas-sensing solutions. With a growing body of publications, 99 citations, and an h-index of 5, Ms. Lin’s research is advancing the frontier of optical and photoacoustic sensing by refining detection mechanisms, hybridizing technologies, and enabling highly sensitive, cost-efficient monitoring systems for a wide range of real-world applications.
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Lin, L., Lin, H., Hong, G., He, J., Wang, L., Zhuang, R., Zhu, W., Zhong, Y., Yu, J., & Zheng, H. (2025). A compact 2.3 μm DFB-laser CO sensor using MPC-LITES for real-time monitoring of cigarette smoke. Sensors, 25.
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Zhuang, R., He, J., Lin, H., Luo, H., Lin, L., Wang, L., Liu, B., Zhu, W., Zhong, Y., Yu, J., et al. (2025). Conductance-photoacoustic spectroscopy for fast and concurrent sensing of hydrogen and hydrocarbons. Photoacoustics, 2025.
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Zhuang, R., Huang, J., Zhao, Y., Liao, H., He, J., Lin, L., Zhu, W., Zhong, Y., Liu, B., Yu, J., et al. (2025). Cost-effective hydrogen sensor employing a quartz crystal tuning fork. Microwave and Optical Technology Letters, 2025.
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Wang, C., Lin, L., Zeng, X., Xie, J., Luo, H., Lin, H., Wang, L., Tang, J., Cui, R., & Zhu, W., et al. (2024). PPB-level CO₂ sensor based on a miniature multipass cell with eight-petaled spot pattern. Microwave and Optical Technology Letters, 2024.
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Lin, H., Liu, Y., Lin, L., Zhu, W., Zhou, X., Zhong, Y., Giglio, M., Sampaolo, A., Patimisco, P., & Tittel, F. K., et al. (2023). Application of standard and custom quartz tuning forks for quartz-enhanced photoacoustic spectroscopy gas sensing. Applied Spectroscopy Reviews, 2023.