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

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http://hdl.handle.net/10138/324433

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Tomberg , T , Hieta , T , Vainio , M & Halonen , L 2019 , Sensitivity enhancement of a cantilever-enhanced photo-acoustic spectroscopic sensor by an optical build-up cavity . in 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) . IEEE , Piscataway, NJ , The 2019 Conference on Lasers & Electro-Optics / Europe and the European Quantum Electronics Conference (CLEO®/Europe-EQEC) , München , Germany , 23/06/2019 . https://doi.org/10.1109/CLEOE-EQEC.2019.8873303

Title: Sensitivity enhancement of a cantilever-enhanced photo-acoustic spectroscopic sensor by an optical build-up cavity
Author: Tomberg, Teemu; Hieta, Tuomas; Vainio, Markku; Halonen, Lauri
Contributor: University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
Publisher: IEEE
Date: 2019
Language: eng
Number of pages: 1
Belongs to series: 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
ISBN: 978-1-7281-0469-0
URI: http://hdl.handle.net/10138/324433
Abstract: 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.
Subject: 116 Chemical sciences
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