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A frequency-modulated quantum-cascade laser for spectroscopy of CH4 and N2O isotopomers

  Articoli su Riviste JCR/ISI  (anno 2005)

Autori:  Gagliardi G., Borri S., Tamassia F., Capasso F., Gmachl C., Sivco D. L., Baillargeon J. N., Hutchinson A. L., Cho A

Affiliazione Autori:  Istituto Nazionale di Ottica Applicata, Comprensorio ‘A.Olivetti’, Via Campi Flegrei 34, 80078 Pozzuoli Naples, Italy; European Laboratory for Non-Linear Spectroscopy, via Nello Carrara 1, 50019 Sesto F. (FI), Italy; Dipartimento di Chimica Fisica e Inorganica, Università di Bologna, viale Risorgimento 4, 40136 Bologna, Italy; Division of Engineering and Applied Sciences, Harvard University, 310 Cruft Laboratory,19 Oxford Street, Cambridge, MA 02138, USA; Department of Electrical Engineering, E-Quad B326, Princeton University, Princeton, NJ 08544, USA; Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974, USA

Riassunto:  We report the development of a novel laser spectrometer for high-sensitivity detection of methane and nitrous oxide. The system relies on a quantum-cascade laser source emitting wavelength of around 8.06 mu m, where strong fundamental absorption bands occur for the considered species and their isotopomers. The detection technique is based on audio-frequency and radio-frequency modulation of laser radiation. First experimental tests have been performed to estimate the achievable detection limits and the signal reproducibility levels in view of possible measurements of C-13/C-12, O-18/O-16, O-17/O-16 and N-15/N-14 isotope ratios.

Rivista/Giornale:  ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
Volume n.:  41 (4)      Pagine da: 313  a: 321
Ulteriori informazioni:  The authors wish to thank Massimo Inguscio and Paolo De Natale for helpful and stimulating discussions. The work performed at Bell Laboratories, Lucent Technologies was partly supported by Darpa/US Army Research Office under contract DAAD19-00-C-0096.
DOI: 10.1080/10256010500384572

*Impact Factor della Rivista: (2005) 1.500   *Citazioni: 19
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  21/07/2019

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