PURPOSE: To provide a process for production of a periodic inversion type photorefractive waveguide which decreass man-hour for mending by preventing the generation of crack and lowering a defective rate during working, makes it possible to execute poling regardless of the sizes and dimensional ratios of crystals, easily produces periodic inversion waveguides at a low cost and facilitates formation of the finer polarization patterns thereof.
CONSTITUTION: Plural electrodes 11 periodically arranged on a pair of the surfaces of a BaTiO3 single crystal 10 worked to be a prescribed shape are brought into contact with the single crystal 10 so as to hold the single crystal therebetween. All the polarities of the electrodes on the one surface are set positive and the polarities of the electrodes on the other surface negative. A uniform electric field is impressed to the single crystal 10 to monopolarize the single crystal. The inverted polarizations are thereafter partially generated in the single crystal by inverting the polarities of the arbitrary electrodes.
TOMOMATSU KAZUHIKO
MIMURA SHOJI
KUROSAKA AKITO
TOMINAGA HARUO
KITAYAMA KENICHI
ITO FUMIHIKO
NIPPON TELEGRAPH & TELEPHONE