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A constant intensity technique to improve the performances of devices based on direct absorption spectroscopy

  Articoli su Riviste JCR/ISI  (anno 2015)

Autori:  Montori A., Depas M., Giuntini M., Siciliani De Cumis M., Viciani S., D'Amato F

Affiliazione Autori:  CNR-INO, V.G. Sansone 1, Sesto Fiorentino (FI), 50019, Italy; LENS, University of Florence, V.N. Carrara 1, Sesto Fiorentino (FI), 50019, Italy; CNR-INO, L.go E. Fermi 6, Firenze, 50125, Italy

Riassunto:  We describe an all-in-fibre apparatus for Constant Intensity Direct Absorption Spectroscopy (CIDAS) for gas concentration measurements which keeps the power of a diode laser constant along the frequency sweep. The reduction of the large variation of the laser power, connected to the frequency scan, enhances the ability of detecting small variations in a background signal, resulting in an increase of the sensitivity with respect to standard direct absorption techniques. Moreover, CIDAS allows for a real-time observation of the absorption signals without any kind of post-detection processing. The apparatus has been tested with carbon dioxide (CO2) and methane (CH4), around 1.57 and 1.65 µm, respectively.

Rivista/Giornale:  OPTO-ELECTRONICS REVIEW
Volume n.:  23 (1)      Pagine da: 28  a: 32
Ulteriori informazioni:  Regione Toscana. - The authors acknowledge the financial support of Regione Toscana, in the frame of ”POR CREO FESR 2007–2013”, Project SIMPAS (Innovative Measurement Systems for the protection of Environment and Health).
DOI: 10.1515/oere-2015-0002

*Impact Factor della Rivista: (2015) 1.611
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  26/05/2019

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