Combining reverse proton exchange and uniform periodic poling in LiNbO<sub>3</sub> 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 1.5μm.
© 2004 Optical Society of America
Giuseppe Leo, Antonio Amoroso, Lorenzo Colace, Gaetano Assanto, Rostislav V. Roussev, and Martin M. Fejer, "Low-threshold spatial solitons in reverse-proton-exchanged periodically poled lithium niobate waveguides," Opt. Lett. 29, 1778-1780 (2004)