Abstract

Periodically-poled waveguides have become important for nonlinear frequency conversion because of the advantages inherent in quasi-phasematching and in the guided-wave nature of the interaction.¹ A variety of techniques have been used to produce periodically-poled waveguides; one that has received particular attention is electric field poling, in which an electric field large enough to invert ferroelectric domains is applied to a periodic electrode.^2,3 This approach to domain inversion suffers from difficulties inherent in controlling the width of the inverted domain, which is necessary in order to optimize the second harmonic output power.

© 1996 Optical Society of America