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Planar laser-based QEPAS trace gas sensor

  • Harbin Institute of Technology
  • Rice University

Research output: Contribution to journalArticlepeer-review

Abstract

A novel quartz enhanced photoacoustic spectroscopy (QEPAS) trace gas detection scheme is reported in this paper. A cylindrical lens was employed for near-infrared laser focusing. The laser beam was shaped as a planar line laser between the gap of the quartz tuning fork (QTF) prongs. Compared with a spherical lens-based QEPAS sensor, the cylindrical lens-based QEPAS sensor has the advantages of easier laser beam alignment and a reduction of stringent stability requirements. Therefore, the reported approach is useful in long-term and continuous sensor operation.

Original languageEnglish
Article number989
JournalSensors
Volume16
Issue number7
DOIs
StatePublished - 1 Jul 2016

Keywords

  • Cylindrical lens
  • HO quantification
  • Planar laser
  • QEPAS

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