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)
Abstract: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.