In this work, we report on a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for hydrogen sulfide (H2S) detection, exploiting a liquid-nitrogen-cooled THz quantum cascade laser (QCL) operating in pulsed mode. The spectrophone was designed to accommodate a THz QCL beam and consisted of a custom quartz tuning fork with a large prong spacing, coupled with acoustic resonator tubes. The targeted rotational transition falls at 2.87 THz (95.626 cm 1), with a line-strength of 5.53 ∙ 10-20 cm/mol. A THz QCL peak power of 150 mW was measured at a heat sink temperature of 81 K, pulse width of 1 μs and repetition rate of 15.8 kHz. A QEPAS record sensitivity for H2S detection in the THz range of 360 part-per-billion in volume was achieved at a gas pressure of 60 Torr and 10 s integration time.

H2S quartz-enhanced photoacoustic spectroscopy sensor employing a liquid-nitrogen-cooled THz quantum cascade laser operating in pulsed mode / Sampaolo, Angelo; Yu, Chenren; Wei, Tingting; Zifarelli, Andrea; Giglio, Marilena; Patimisco, Pietro; Zhu, Huan; Zhu, Haiqing; He, Li; Wu, Hongpeng; Dong, Lei; Xu, Gangyi; Spagnolo, Vincenzo. - In: PHOTOACOUSTICS. - ISSN 2213-5979. - ELETTRONICO. - 21:March(2021). [10.1016/j.pacs.2020.100219]

H2S quartz-enhanced photoacoustic spectroscopy sensor employing a liquid-nitrogen-cooled THz quantum cascade laser operating in pulsed mode

Sampaolo, Angelo;Giglio, Marilena;Patimisco, Pietro;Spagnolo, Vincenzo
2021-01-01

Abstract

In this work, we report on a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for hydrogen sulfide (H2S) detection, exploiting a liquid-nitrogen-cooled THz quantum cascade laser (QCL) operating in pulsed mode. The spectrophone was designed to accommodate a THz QCL beam and consisted of a custom quartz tuning fork with a large prong spacing, coupled with acoustic resonator tubes. The targeted rotational transition falls at 2.87 THz (95.626 cm 1), with a line-strength of 5.53 ∙ 10-20 cm/mol. A THz QCL peak power of 150 mW was measured at a heat sink temperature of 81 K, pulse width of 1 μs and repetition rate of 15.8 kHz. A QEPAS record sensitivity for H2S detection in the THz range of 360 part-per-billion in volume was achieved at a gas pressure of 60 Torr and 10 s integration time.
2021
H2S quartz-enhanced photoacoustic spectroscopy sensor employing a liquid-nitrogen-cooled THz quantum cascade laser operating in pulsed mode / Sampaolo, Angelo; Yu, Chenren; Wei, Tingting; Zifarelli, Andrea; Giglio, Marilena; Patimisco, Pietro; Zhu, Huan; Zhu, Haiqing; He, Li; Wu, Hongpeng; Dong, Lei; Xu, Gangyi; Spagnolo, Vincenzo. - In: PHOTOACOUSTICS. - ISSN 2213-5979. - ELETTRONICO. - 21:March(2021). [10.1016/j.pacs.2020.100219]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/213840
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