Low-threshold spatial solitons in reverse-proton-exchanged periodically poled lithium niobate waveguides

G. Leo, A. Amoroso, L. Colace, G. Assanto, R. V. Roussev, and M. M. Fejer

Opt. Lett. 29, 1778 (2004)


Combining reverse proton exchange and uniform periodic poling in LiNbO3 planar waveguides, we demonstrate low-energy spatial optical solitons by second-harmonic generation at room temperature, with a threshold as low as 23 pJ/µm at 1.5 µm.