Wide-angle Ni-diffused LiNbO/sub 3/ abrupt waveguide bend with a proton-exchanged microprism

A novel Ni-diffused abrupt waveguide bend on LiNbO/sub 3/ using proton-exchanged microprism is presented. With the phase delay caused by the microprism, the guided wavefront can be appropriately tilted such that most of the optical power can be kept within the waveguide after passing through the bend corner. The simulated normalized transmitted power of the proposed waveguide bend can be as high as 93.33% for a bend angle of 10/spl deg/. The effects of microprism parameters are also discussed to facilitate the optimal design of the proposed waveguide bend. The experimental results show that the proton-exchanged microprism on LiNbO/sub 3/ does significantly enhance the transmitted power.