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Both titanium and germanium were introduced into silicon dioxide system by sol-gel method to move its region of anomalous dispersion caused by IR resonance absorption towards the wavelength of CO 2 laser.It is indicated by IR absorption spectra that as the content of SiO 2 decreases in this glass system TiO 2 and GeO 2 tends to exist in their own phases.As for the gel glass with a composition of 40SiO 2·30TiO 2·30GeO 2,when the temperature is below 600℃,germanium atoms exist mainly in Ge-O-Ge bonds.With the temperature increasing from 800℃ to 1000℃, titanium atoms in Si-O-Ti bonds almost transform into Ti-O-Ti bonds.Furthermore,a large number of Si-O-Ti and Si-O-Ge bonds formed when the temperature approaches 800℃,which makes a notable IR absorption band round the wavelength of CO 2 laser.Therefore, sol-gel based SiO 2-TiO 2-GeO 2 gel glass is a candidate material for CO 2 laser hollow waveguide.
Both titanium and germanium were introduced into silicon dioxide system by sol-gel method to move its region of anomalous dispersion caused by IR resonance absorption towards the wavelength of CO 2 laser. It is indicated by IR absorption spectra that as the content of SiO in this glass system TiO 2 and GeO 2 tends to exist in their own phases. As for the gel glass with a composition of 40SiO 2 .30TiO 2 .30GeO 2, when the temperature is below 600 ° C., germanium atoms exist mainly in Ge- O-Ge bonds.With the temperature increasing from 800 ° C to 1000 ° C, titanium atoms in Si-O-Ti bonds almost transform into Ti-O-Ti bonds.Furthermore, a large number of Si-O-Ti and Si-O -Ge bonds formed when the temperature approaches 800 ° C, which makes notable IR absorption band round the wavelength of CO 2 laser. Beforefore, sol-gel based SiO 2 -TiO 2 -GeO 2 gel glass is a candidate material for CO 2 laser hollow waveguide.