Abstract
Absorption characteristics of CO2 molecules dissolved in ZrF4‐based glass are measured using a Fourier transform spectral attenuation measurement system. Absorptions due to vibrational modes appear at 2353, 3606, and 3716 cm1, respectively. The influence of the CO2 impurity on transmission loss is clarified. The interaction between dissolved CO2 molecules and the glass matrix is discussed on the basis of the measured spectra.