Scientific Results

Diode laser spectroscopy of ethylene overtones at 830 nm

Year: 2011

Authors: Lucchesini A., Gozzini S.

Autors Affiliation: Istituto Nazionale di Ottica – CNR – U.O.S. “Adriano Gozzini”, Area della Ricerca – Via G. Moruzzi, 1 – 56124 Pisa, Italy

Abstract: A tunable diode laser spectrometer has been employed to examine the 3rd overtone absorption lines of C(2)H(4) at around 12 000 cm(-1) (830 nm). The spectrometer sources are heterostructure AlGaAs tunable diode lasers operating \”free-running\”. By the aid of the wavelength modulation spectroscopy with the second harmonic detection technique and a Herriott type multipass cell 63 very weak absorption lines have been observed for the first time, with cross sections as low as 2 x 10(-26) cm(2)/mol, equivalent to congruent to 0.05 km(-1) /amagat. The self-broadening coefficient has been measured for one of the most intense lines. (C) 2011 Elsevier Ltd. All rights reserved.

Journal/Review: JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER

Volume: 112 (9)      Pages from: 1438  to: 1442

KeyWords: Ethylene; Overtone bands; Line and band widths; Tunable diode laser; Wavelength modulation spectroscopy
DOI: 10.1016/j.jqsrt.2011.03.002

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