Spatially Modulated Channel Waveguide Elements Optically Written in Photorefractive Lithium Niobate

Abstract

Optical inducing of the channel waveguide elements with spatial modulated parameters in lithium niobate sample with Cu-doped layer is experimentally demonstrated. The channel waveguides have been formed via the point-by-point exposure at light wavelengths of 532 nm and 450 nm. It is shown that the distance between exposing light spot centers affects to the homogeneity and width of channel waveguides.