Abstract

Ferroelectrics with periodically arranged antiparallel domains are very attractive for applications in nonlinear optics,¹ the major difficulty being the fabrication of perfect periodic structures. To produce bulk crystals we used Czochralski growth of lithium niobate crystals doped with Y, Dy, and with Mg as a second dopant, and barium-sodium niobate. Both crystals were grown along the ferroelectric z-axis, and lithium niobate along $\left[01\overline{1}2\right]$-direction as well (at 57° to z-axis in YZ-plane).

© 1994 IEEE