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Quartz-tuning-fork enhanced photothermal spectroscopy for ultra-high sensitive trace gas detection

Optics express, 2018-11, Vol.26 (24), p.32103-32110 [Peer Reviewed Journal]

ISSN: 1094-4087 ;EISSN: 1094-4087 ;DOI: 10.1364/OE.26.032103 ;PMID: 30650676

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  • Title:
    Quartz-tuning-fork enhanced photothermal spectroscopy for ultra-high sensitive trace gas detection
  • Author: Ma, Yufei ; He, Ying ; Tong, Yao ; Yu, Xin ; Tittel, Frank K
  • Is Part Of: Optics express, 2018-11, Vol.26 (24), p.32103-32110
  • Description: A gas sensing method based on quartz-tuning-fork enhanced photothermal spectroscopy (QEPTS) is reported in this paper. Unlike usually used thermally sensitive elements, a sharply resonant quartz-tuning-fork with the capability of enhanced mechanical resonance was used to amplify the photothermal signal level. Acetylene (C H ) detection was used to verify the QEPTS sensor performance. The measured results indicate a minimum detection limit (MDL) of 718 ppb and a normalized noise equivalent absorption coefficient (NNEA) of 7.63 × 10 cm W/√Hz. This performance demonstrates that QEPTS can be an ultra-high sensitive technique for gas detection and shows superiority when compared to usually used methods of tunable diode laser absorption spectroscopy (TDLAS) and quartz-enhanced photoacoustic spectroscopy (QEPAS). Furthermore, when compared to an optical detector, especially a costly mercury cadmium telluride (MCT) detector with cryogenic cooling used in TDLAS, a quartz-tuning-fork is much cheap and tiny. Besides, compared to the QEPAS technique, QEPTS is a non-contact measurement technique and therefore can be used for standoff and remote trace gas detection.
  • Publisher: United States
  • Language: English
  • Identifier: ISSN: 1094-4087
    EISSN: 1094-4087
    DOI: 10.1364/OE.26.032103
    PMID: 30650676
  • Source: Geneva Foundation Free Medical Journals at publisher websites
    Directory of Open Access Journals
    Alma/SFX Local Collection
    ROAD: Directory of Open Access Scholarly Resources
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