Abstract

Photorefractive planar waveguides have been fabricated in cerium-doped strontium barium niobate (SrxBa1−xNb2O6, SBN) single crystals by ion-beam implantation. The losses measured were as low as 0.1 and 7.0 dB cm−1 for the TM and the TE modes, respectively. Subsequent two-beam-coupling experiments performed on the waveguides showed that, unlike for BaTiO3 and KNbO3 waveguides formed by ion-beam implantation, the two-beam-coupling gain direction did not reverse. Also, the response time had been reduced by 2 orders of magnitude.

© 1996 Optical Society of America

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