Absorption spectroscopy spectroscopy of ethylene near 1.62 μm at high temperatures

We report the measured line positions, line intensities, self-broadening coefficients and its temperature exponent n of C2H4 for more than 50 lines in the frequency range 6167.39 to 6177.71 cm(-1). These spectroscopic parameters were determined by multi-line fitting using the Voigt profile of absorption spectra measured with a distributed-feedback (DFB) tunable diode laser in a well-controlled heated static absorption cell in a temperature range of 296-600 K. The key factors influencing the uncertainties in the determination of the line intensities and self-broadening coefficients were analyzed respectively. To the best of our knowledge, this is the first study that measures the spectrum of C2H4 near 1.62 mu m and the line parameters at elevated temperature. (C) 2019 Elsevier Ltd. All rights reserved.