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1 2005

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Research on absorption spectroscopy of CH4 around 1,315um

Shao J., Gao X., Deng L., Huang W., Yang Y., Pei S., Yuan Y., Zhang W.

Optica Applicata

2005

Vol. 35, nr 1

155-162

Measurements have been made about the absorption features of Ch4 around 1.315 um by using the second harmonic detwction technique of tunable diode laser with multipass cell (white). Studies concerning the second harmonic detecyion technique of CH4 around 1.65 um have been widely reported currently, but reports about the absorption features in NIR spectra of CH4 around 1.315 um can scarcely be found. We have performed a detailed study about the absorption features of CH4 around 1.315 um and we presents the results here. We give the line positions, the line intensties and self-broadening coefficients near 1.315 um at a pressure of 0.077 torr.