Compositional Design of Glasses with Large Second- and Third-Order Optical Nonlinearity.

Abstract

In order to make a compositional design for glasses with large second- and third-order optical nonlinearity, second- and third-harmonic generation of various glasses were measured. For the glasses with large nonresonant type third-order optical nonlinearity, the nonlinear susceptibility increased in the glasses with high linear refractive index, high coordination number and high ionicity. Resonant type large third-order optical nonlinearity can be seen in semiconductor and metal microcrystals-doped glasses. In this case, the role of matrix glasses was significant on the third-order nonlinearity. For glasses with large second-order nonlinearity, external treatment was indispensable, thermal poling being effective to cause second-order optical nonlinearity.