High-precision measurements of CO2 concentration in air by means of diode-laser absorption spectroscopy near 2 um

R. Restieri; Gianluca Gagliardi; G. De Biasio; F. Cotrufo; Livio Gianfrani

doi:10.1117/12.417368

14 February 2001 High-precision measurements of CO₂ concentration in air by means of diode-laser absorption spectroscopy near 2 μm

R. Restieri, Gianluca Gagliardi, G. De Biasio, F. Cotrufo, Livio Gianfrani

Author Affiliations +

Proceedings Volume 4199, Water, Ground, and Air Pollution Monitoring and Remediation; (2001) https://doi.org/10.1117/12.417368
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

Abstract

12 A compact and portable laser-based sensor has been developed for absolute measurements of CO₂ concentration with high precision and accuracy, in air samples at atmospheric pressure. a DFB diode laser, operating near 2 micrometers at room temperature, was used. It was tuned into resonance with the R(34) line of the v₁ + 2v₂ degree(s) + v₃ combination band. The laser beam was fiber-coupled in order to allow remote operation. Severe tests of the spectrometer were done using certified air mixtures, with the aim to determine its performance. Applications to atmospheric monitoring were discussed. Particularly, the suitability of our spectrometer for measuring soil CO₂ efflux was demonstrated.

Citation Download Citation

R. Restieri, Gianluca Gagliardi, G. De Biasio, F. Cotrufo, and Livio Gianfrani "High-precision measurements of CO₂ concentration in air by means of diode-laser absorption spectroscopy near 2 μm", Proc. SPIE 4199, Water, Ground, and Air Pollution Monitoring and Remediation, (14 February 2001); https://doi.org/10.1117/12.417368

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