Abstract.
A near-infrared diode laser spectrometer is set up to study the absorption line shape of acetylene in the 782 nm region. The second-derivative spectra recorded by source modulation technique have enhanced sensitivity. Careful choice of operating current and diode temperature leads to distortion-free line shape for six rotational components of the (ν1+3ν3) overtone-combination mode of acetylene. Self- and nitrogen-broadening coefficients and line-strength parameters have been extracted by fitting the observed line shape with Voigt profiles. There is no evidence of the effect of velocity changing collisions on the line shape in this near-infrared band.
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Received: 6 July 1998 / Revised version: 2 November 1998 / Published online: 10 March 1999
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Biswas, D., Ray, B., Dutta, S. et al. Diode laser spectroscopic measurement of line shape of (ν1+3ν3) band transitions of acetylene . Appl Phys B 68, 1125–1130 (1999). https://doi.org/10.1007/s003400050755
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DOI: https://doi.org/10.1007/s003400050755