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Ozone detection by differential absorption spectroscopy at ambient pressure with a 9.6�?m pulsed quantum-cascade laser
2004
Applied physics B
We report direct absorption spectroscopic detection of ozone at ambient pressure with a pulsed, DFB quantumcascade laser (QCL) tuned within 1044-1050 cm −1 by temperature scanning. Wavelength calibration curves were derived from FTIR and CO 2 spectra and interpreted with respect to the heat transfer from the heterostructure to the sink. The laser linewidth (∼ 0.13 cm −1 FWHM) was found to decrease with temperature, probably as a result of operation at constant current. Spurious spectral
doi:10.1007/s00340-003-1358-5
fatcat:47zvv6xtfvacjeosvts6kdl4x4