Diode laser spectroscopy of CO2 in the 1.6 μm region for the in situ sensing of the middle atmosphere

A diode laser spectrometer was used in the laboratory to study CO2 line intensities and pressure-broadening coefficients near 1.6 mum. The spectral region ranging from 6230 to 6250 cm(-1) which is suitable for the in situ sensing of carbon dioxide in the lower stratosphere was studied using a commercial telecommunication-type diode laser. Thirteen lines of the (30(0)1)(III) <-- (000) band Of CO2 have been studied. The results of intensity measurements are compared to previous determinations and available databases. Furthermore the broadening coefficients by N-2 and O-2 for the strongest transitions are also reported and analyzed. Finally, preliminary measurements of stratospheric CO2 achieved in 2002 with the "SDLA" balloonborne TDL-spectrometer are discussed. (C) 2003 Elsevier Ltd. All rights reserved.