Shigeru Yamagata

Highly Efficient Optical Second Harmonic Generation in Poled Ti-Doped Silica Glasses.

Optical second harmonic intensity of poled Ti-doped silica glasses prepared by the Verneuil method has been measured. The second-order nonlinear coefficient, d33, of the glasses prepared from starting materials of TiO2 and SiO2 powders ranges from 0.2 to 0.5 pm/V. These values are one order of magnitude larger than that for silica glass without intentional dopants.

Effect of γ-irradiation on optical second harmonic intensity of electrically poled silica glass

Optical second harmonic generation has been observed in γ-irradiated and subsequently electrically poled silica glasses. The second-order nonlinear susceptibility, as well as the second harmonic intensity, increases with an increase in the γ-ray dose. The larger second harmonic intensity of γ-irradiated silica glasses may be related to the defects created by γ-irradiation.