Second Harmonic Generation in coupled LiNbO3 waveguides by reverse proton exchange

A. Amoroso, A. Di Falco, G. Leo, G. Assanto, A. Parisi, A. Cino, and S. Riva Sanseverino

IEEE Photon. Techn. Lett. 15, 443-445 (2003)


We demonstrate second harmonic generation of a near-infrared pump in a nonlinearly-coupled system formed by longitudinally uniform, proton- and reverse-proton-exchanged LiNbO3 planar waveguides. Phase- and mode- matched TE0 frequency doubling into TM higher-order guided modes is achieved through temperature control, in agreement with the model.