N2-cooled THz quartz-enhanced photoacoustic sensor operating in pulsed mode for hydrogen sulfide detection in the part-per-billion concentration range

Andrea Zifarelli; Angelo Sampaolo; Pietro Patimisco; Marilena Giglio; Chenren Yu; Huan Zhu; Haiqing Zhu; Gaolei Chang; Fangfang Wang; Jianxin Chen; Lianhe Li; A. Giles Davies; Edmund H. Linfield; Li He; Tingting Wei; Hongpeng Wu; Lei Dong; Gangyi Xu; Frank K. Tittel; Vincenzo Spagnolo

doi:10.1117/12.2545707

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31 January 2020 N₂-cooled THz quartz-enhanced photoacoustic sensor operating in pulsed mode for hydrogen sulfide detection in the part-per-billion concentration range

Andrea Zifarelli, Angelo Sampaolo, Pietro Patimisco, Marilena Giglio, Chenren Yu, Huan Zhu, Haiqing Zhu, Gaolei Chang, Fangfang Wang, Jianxin Chen, Lianhe Li, A. Giles Davies, Edmund H. Linfield, Li He, Tingting Wei, Hongpeng Wu, Lei Dong, Gangyi Xu, Frank K. Tittel, Vincenzo Spagnolo

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Proceedings Volume 11288, Quantum Sensing and Nano Electronics and Photonics XVII; 112881W (2020) https://doi.org/10.1117/12.2545707
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Many applications such as toxic gas detection or H₂S monitoring in natural gas require operation in the THz spectral region, where gas species show distinct spectral “fingerprints” that can be easily discriminated by the gas matrix background absorption features.
So far, continuous-wave THz quantum cascade lasers employed in quartz-enhanced photoacoustic (QEPAS) sensors required liquid helium-cooling systems. In this work, we demonstrated the first liquid nitrogen-cooled THz QEPAS sensor for H₂S detection operated in pulsed mode and mounting a spectrophone based on a quartz tuning fork with 1.5 mm prong spacing. A sensitivity level in the part-per-billion concentration range was achieved.

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Andrea Zifarelli, Angelo Sampaolo, Pietro Patimisco, Marilena Giglio, Chenren Yu, Huan Zhu, Haiqing Zhu, Gaolei Chang, Fangfang Wang, Jianxin Chen, Lianhe Li, A. Giles Davies, Edmund H. Linfield, Li He, Tingting Wei, Hongpeng Wu, Lei Dong, Gangyi Xu, Frank K. Tittel, and Vincenzo Spagnolo "N₂-cooled THz quartz-enhanced photoacoustic sensor operating in pulsed mode for hydrogen sulfide detection in the part-per-billion concentration range", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112881W (31 January 2020); https://doi.org/10.1117/12.2545707

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