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

• Autorzy: Montori A. , Pas de M. , Giuntini M. , Siciliani Cumis de M. , Viciani S. , D’Amato F.

Identyfikatory

DOI

10.1515/oere-2015-0002

• Konferencja: Advanced Infrared Technology and Applications - AITA 2013 (12 ; 10-13.09.2013 ; Turin, Italy)
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

applied spectroscopy; laser based detection; direct absorption; constant power intensity; fibre optics

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2015
• Tom: Vol. 23, No. 1
• Strony: 28--32
• Opis fizyczny: Bibliogr. 13 poz., wykr.

Twórcy

autor

Montori A.

• CNR-INO, V. G. Sansone 1, 50019 Sesto Fiorentino (FI), Italy
• LENS, University of Florence, V. N. Carrara 1, 50019 Sesto Fiorentino (FI), Italy

autor

Pas de M.

• LENS, University of Florence, V. N. Carrara 1, 50019 Sesto Fiorentino (FI), Italy

autor

Giuntini M.

• LENS, University of Florence, V. N. Carrara 1, 50019 Sesto Fiorentino (FI), Italy

autor

Siciliani Cumis de M.

• CNR-INO, V. G. Sansone 1, 50019 Sesto Fiorentino (FI), Italy

autor

Viciani S.

• CNR-INO, L.go E. Fermi 6, 50125 Firenze, Italy

autor

D’Amato F.

• CNR-INO, L.go E. Fermi 6, 50125 Firenze, Italy

Bibliografia

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• 4. P. Werle, F. Slemr, M. Gehrtz, and C Briiuchle, “Quantum-limited FM-spectroscopy with a lead-salt diode laser”, Appl. Phys. 1549, 99-108 (1989).
• 5. F. D’Amato and M. De Rosa, “Tunable diode lasers and two-tone frequency modulation spectroscopy applied to atmospheric gas analysis”, Opt. Laser Eng. 37, 533-551 (2002).
• 6. A. Miklos and M. Feher, “Optoacoustic detection with near-infrared diode lasers: trace gases and short-lived molecules”, Infrared Phys. Techn. 37, 21-27 (1996).
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• 8. P. Werle, C. Dyroff, A. Zahn, P. Mazzinghi, and F. D’Amato, “A new concept for sensitive in-situ stable isotope ratio infrared spectroscopy based on sample modulation”, Isot. Environ. Healt. S. 41, 323-333 (2005).
• 9. F.M. Schmidt, A. Foltynowicz, W.G. Ma, and O. Axner, “Fibre-laser-based noise-immune cavity-enhanced optical heterodyne molecular spectrometry for Doppler-broadened detection of C2H2 in the parts per trillion range”, J. Opt. Soc. Am. B - Opt. Phys. 24, 1392-1405 (2007).
• 10. B. Tuzson, M. Mangold, H. Looser, A. Manninen, and L. Emmenegger, “Compact multipass optical cell for laser spectroscopy”, Opt. Lett. 38, 257-259 (2013).
• 11. E. De Tommasi, G. Casa, and L. Gianfrani, “An intensity-stabilized diode-laser spectrometer for sensitive detection of NH3”, IF.EE T. Instrum. Meas. 56, 309-312 (2007).
• 12. S. Viciani, F. D’Amato, P. Mazzinghi, F. Castagnoli, G. Toci, and P.W. Werle, “A cryogenic operated diode-laser spectrometer for airborne measurement of stratospheric trace gases”, Appl. Phys. 1590, 581-592 (2008).
• 13. L.S. Rothman, D. Jacquemart, A. Barbe, D.C. Benner, M. Birk, L.R. Brown, M.R. Carleer, C. Chackerian Jr., K. Chance, L.H. Coudert, V. Dana, V.M. Devi, J.-M. Flaud, R.R. Gamache, A. Goldman, J.-M. Hartmann, K.W. Jucks, A.G. Maki, J.-Y. Mandin, S.T. Massie, J. Orphal, A. Perrin, C.P. Rinsland, M.A.H. Smith, J. Tennyson, R.N. Tolchenov, R.A. Toth, J. Vander Auwera, P. Varanasi, and G. Wagner, “The HITRAN 2004 molecular spectroscopic database, J. Quant. Spectrosc. Ra. 96, 139-204 (2005).

Uwagi

EN

The authors acknowledge the financial support of Regione Toscana, in the frame of ”POR CREO FESR 2007-2013”, Project SIM PAS (Innovative Measurement Systems for the protection of Environment and Health).