Low-threshold spatial solitons in reverse-proton-exchanged periodically poled lithium niobate waveguides.
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/microm at 1.5 microm.
Leo
Giuseppe
G
Nonlinear Optics and OptoElectronics Laboratory, National Institute for the Physics of Matter, Università "Roma Tre," Via della Vasca Navale 84, 00146 Rome, Italy.
Amoroso
Antonio
A
Colace
Lorenzo
L
Assanto
Gaetano
G
Roussev
Rostislav V
RV
Fejer
Martin M
MM