Vol. 35, Issue 1, pp. 155-162

  1. Archive
  2. Optica Applicata Vol. 35, Issue 1, pp. 155-162 (2005)
Vol. 35 Issue 1 pp. 155-162

Research on absorption spectroscopy of CH4 around 1.315 μm

Jie Shao, Xiaoming Gao, Lunhua Deng, Wei Huang, Yong Yang, Shixi Pei, Yiqian Yuan, Weijun Zhang

Keywords

modulation spectroscopy, diode lasers, the second harmonic detection

Abstract

Measurements have been made about the absorption features of CH4 around 1.315 μm by using the second harmonic detection technique of tunable diode laser with multipass cell (white). Studies concerning the second harmonic detection technique of CH4 around 1.65 μm have been widely reported currently, but reports about the absorption features in NIR spectra of CH4 around 1.315 mm can scarcely be found. We have performed a detailed study about the absorption features of CH4 around 1.315 μm and we present the results here. We give the line positions, the line intensities and self-broadening coefficients near 1.315 μm at a pressure of 0.077 torr.

Vol. 35
Issue 1
pp. 155-162

0.24 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology