论文信息 - High sensitivity absorption spectroscopy of CH4 around 1.31 μm

High sensitivity absorption spectroscopy of CH4 around 1.31 μm

The absorption spectra of CH4 around 1.31 μm have been observed by wavelength modulation absorption spectroscopy technique employed with a tunable diode laser at different pressure. The overtone spectra of CH4 around 1.31 μm and the corresponding spectral parameters (i.e. positions intensities self-broadening coefficients) are presented. The intensity of the weakest line detected is 1.306x10-26 cm-1/(molecule-cm-2) at the pressure of 0.077 Torr with a corresponding absorption of l.174x10-7.

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