Osamu MATOBA, Kazuyoshi ITOH and Yoshiki ICHIOKA

Department of Applied Physics, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565 Japan

(Accepted June 20, 1994)

In this letter, we estimate the refractive index distribution in a photo-induced waveguide. The photo-induced waveguide was fabricated by scanning a focused laser beam through a lithium niobate crystal. We made use of a parametric model of refractive index distribution of the photo-induced waveguide. The results of numerical simulation on the near-field patterns of curved waveguides are compared with experimental results.

Key words : optical interconnection, neural computing, photorefractive effect, photo-induced waveguide, lithium niobate crystal, beam propagation method