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Intracavity quartz-enhanced photoacoustic sensor

  Articoli su Riviste JCR/ISI  (anno 2014)

Autori:  Borri S., Patimisco P., Galli I., Mazzotti D., Giusfredi G., Akikusa N., Yamanishi M., Scamarcio G., De Natale P., Spagnolo V

Affiliazione Autori:  CNR-INO UOS Sesto Fiorentino and LENS, via Carrara 1, 50019 Sesto Fiorentino FI, Italy; CNR-IFN UOS Bari and Dipartimento Interateneo di Fisica, Universita degli Studi di Bari e Politecnico di Bari, via Amendola 173, 70126 Bari BA, Italy; Development Bureau Laser Device R&D Group, Hamamatsu Photonics KK, Shizuoka 434-8601, Japan; Central Research Laboratories, Hamamatsu Photonics KK, Shizuoka 434-8601, Japan

Riassunto:  We report on a spectroscopic technique named intracavity quartz-enhanced photoacoustic spectroscopy (I-QEPAS) employed for sensitive trace-gas detection in the mid-infrared spectral region. It is based on a combination of QEPAS with a buildup optical cavity. The sensor includes a distributed feedback quantum cascade laser emitting at 4.33 mu m. We achieved a laser optical power buildup factor of similar to 500, which corresponds to an intracavity laser power of similar to 0.75 W. CO2 has been selected as the target molecule for the I-QEPAS demonstration. We achieved a detection sensitivity of 300 parts per trillion for 4 s integration time, corresponding to a noise equivalent absorption coefficient of 1.4 x 10(-8) cm(-1) and a normalized noise-equivalent absorption of 3.2 x 10(-10) W cm(-1) Hz(-1/2). (C) 2014 AIP Publishing LLC.

Rivista/Giornale:  APPLIED PHYSICS LETTERS
Volume n.:  104 (9)      Pagine da: 091114  a: 091114
Ulteriori informazioni:  This work was financially supported by the Italian Ministry for University and Research through the Italian national Project Nos. PON01_02238, PON02_00675, PON02_00576, by the project \"Active Ageing@home\" within the National Technological Cluster (CTN) venture in the PON-2013-FESR framework, and by the Laserlab-Europe consortium within the Joint Research Activity 2012-2015 JRA4: EURO-LITE.
DOI: 10.1063/1.4867268

*Impact Factor della Rivista: (2014) 3.302   *Citazioni: 50
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  14/07/2019

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