Second Harmonic Generation in Reverse Proton Exchanged Lithium Niobate Waveguides

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

Opt. Express 8, 232-237(2001)

Abstract:

We investigate efficient second harmonic generation in reverse proton exchanged Lithium Niobate waveguides. In z-cut crystals, the resulting buried and surface guides support TM and TE polarizations, respectively, and are coupled through the d_{31_{nonlinear element. Numerically estimated conversion efficiencies in planar structures operating at 1.32µm reach 90% in 2cm or a normalized 14%µm/W cm}}