Abstract

Cascading has been recently proposed¹ and demonstrated in KTP-based structures as a means to achieve significant optically induced phase shifts because of coupled second-harmonic and down-conversion processes in a mismatched configuration. In view of record high quadratic nonlinear susceptibilities of organic materials,² we have extended this approach to molecular crystals, which had been previously developed toward such applications as three-wave mixing and optical parametric oscillation. Their potential toward outstanding performance in the realm of χ⁽³⁾ processes based on cascading³ and eventually outperforming other type of materials and nonlinear effects toward all-optical signal processing is being currently established as follows.

© 1994 IEEE