Broadband photoacoustic spectroscopy using quantum cascade laser arrays for compositional analysis of airborne aerosols

Chien-Sheng Liao; Eric Languirand; Justin Curtiss; Romain Blanchard; Christian Pfluegl; Darren Emge; Daryoosh Vakhshoori

doi:10.1117/12.2588050

12 April 2021 Broadband photoacoustic spectroscopy using quantum cascade laser arrays for compositional analysis of airborne aerosols

Chien-Sheng Liao, Eric Languirand, Justin Curtiss, Romain Blanchard, Christian Pfluegl, Darren Emge, Daryoosh Vakhshoori

Author Affiliations +

Proceedings Volume 11749, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXII; 1174907 (2021) https://doi.org/10.1117/12.2588050
Event: SPIE Defense + Commercial Sensing, 2021, Online Only

Abstract

Building on our previous development of a compact, portable, and low SWaP gas analyzer (11” x 6.7” x 5.1”, 7.8 lbs) based on photoacoustic spectroscopy and using broadband quantum cascade laser arrays, we demonstrate here compositional analysis of airborne aerosols using this instrument. With an integration time of 330-ms per laser, and ~70 seconds for a spectrum covering 950-1500 cm^-1, our instrument showed a detection sensitivity at the mg/m³level for solid and liquid-loaded solid aerosols. Additionally, Malathion-loaded aerosols can be discriminated from pure Syloid aerosols based on their absorption features. The preliminary results show a potential path for developments of a portable real-time aerosol composition analyzer.

Conference Presentation

Citation Download Citation

Chien-Sheng Liao, Eric Languirand, Justin Curtiss, Romain Blanchard, Christian Pfluegl, Darren Emge, and Daryoosh Vakhshoori "Broadband photoacoustic spectroscopy using quantum cascade laser arrays for compositional analysis of airborne aerosols", Proc. SPIE 11749, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXII, 1174907 (12 April 2021); https://doi.org/10.1117/12.2588050

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