Efficient frequency doubling in reverse proton exchanged lithium niobate waveguides

, , , and . Photonics Technology Letters, IEEE 13 (4): 323--325 (April 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% mu;m/W cm in planar structures excited at 1.32 mu;m

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