Electro-optic effect and its applications in periodically poled optical superlattice LiNbO/sub 3/

Summary form only given. In recent years, more and more research attentions have been paid on periodically poled optical superlattice LiNbO/sub 3/ because of its outstanding nonlinear optical properties. The origin of the attractive characteristics is the periodic nonlinear coefficient caused by the periodic domain structure, thus the quasi-phase-matching technique can be used instead of the conventional phase matching. However, besides the nonlinear coefficient, other third-rank tensors including the electro-optic coefficient also change the sign periodically, which may result in some new properties. Such an idea is demonstrated.