Sensitivity enhancement of a cantilever-enhanced photo-acoustic spectroscopic sensor by an optical build-up cavity

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Laser photo-acoustic spectroscopy (LPAS) is a highly sensitive and selective method for trace gas analysis. One of the most advanced LPAS techniques is cantilever-enhanced photo-acoustic spectroscopy (CEPAS), which can reach down to low-ppt and sub-ppt level trace gas detection sensitivities with high power lasers [1,2]. The selection of wavelengths and tunability of high power narrow linewidth lasers is, however, limited. They are also rarely suitable for field deployable analysers, which would require a small and robust form factor. An alternative approach, potentially overcoming these weaknesses, is to build up the optical power of a standard distributed feedback diode laser (DFB) or a quantum cascade laser in an external optical cavity [3,4]. © 2019 IEEE.
Original languageEnglish
Title of host publication2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
Number of pages1
Place of PublicationPiscataway, NJ
Publication date2019
ISBN (Electronic)978-1-7281-0469-0
Publication statusPublished - 2019
MoE publication typeA4 Article in conference proceedings
EventThe 2019 Conference on Lasers & Electro-Optics / Europe and the European Quantum Electronics Conference (CLEO®/Europe-EQEC) - München, Germany
Duration: 23 Jun 201927 Jun 2019

Fields of Science

  • 116 Chemical sciences

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