Efficient Frequency Doubling in Reverse Proton Exchanged Lithium Niobate Waveguides

A. Di Lallo, C. Conti, A. Cino, and G. Assanto

IEEE Photon. Techn. Lett. 13, 323-325 (2001)


We propose a novel approach for efficient frequency doubling of near infrared light, using the coupled system of buried and surface waveguides obtainable by Reverse Proton Exchange in z-cut Lithium Niobate. In such guides, supporting TM and TE polarizations, respectively, in spite of the use of the d31 nonlinear element, we predict conversion efficiencies as high as 90% or 14% Ám/W cm in planar structures excited at 1.32Ám.