For the first time to our knowledge, photorefractive properties have been observed in planar waveguides fabricated by the technique of ion-beam implantation in BaTiO3 single crystals. The implantation was carried out by using 1.5-MeV H+ ions at a dose of 10−16 ions/cm2. For a given input power, a decrease in the effective photorefractive two-beam coupling response time of ≥102 has been observed, owing to a combination of optical confinement within the waveguide and possible modification of charge-transport properties induced through implantation. Experiments carried out on the two-beam coupling gain show that the gain direction has been reversed in the waveguide compared with that of the bulk crystal.
© 1992 Optical Society of America
Original Manuscript: June 16, 1992
Published: November 1, 1992
K. E. Youden, P. J. Chandler, L. Zhang, S. W. James, R. W. Eason, and P. D. Townsend, "Photorefractive planar waveguides in BaTiO3 fabricated by ion-beam implantation," Opt. Lett. 17, 1509-1511 (1992)