Composition dependence of photoinduced second-order nonlinearity of germanosilicate glasses.
The dependence of the photoinduced second-order nonlinearity of germanosilicate glasses on the GeO(2)-SiO(2) composition was investigated using photoinduced second-harmonic generation (SHG). The photoinduced SHG was encoded by coherent superposition of the 800-nm fundamental and the 400-nm second-harmonic light of a femtosecond laser. Experimental results showed that the photoinduced second-order optical nonlinearity increased with increasing concentrations of GeO(2) in the glasses, and the concentration dependence was mainly due to the dependence of the photoinduced internal dc electric field of the glass on the GeO(2)-SiO(2) composition.
Si
Jinhai
J
Kanehira
Shingo
S
Miura
Kiyotaka
K
Hirao
Kazuyuki
K