We show numerically and experimentally that spatial trapping can be induced in quadratic media even if the pump pulse’s duration is shorter than the group-delay mismatch between fundamental wave and second-harmonic components. The influence of phase mismatch and pulse power on the trapping effect is discussed. Spatial, temporal, and spectral behaviors that accompany self-trapped propagation are highlighted.
© 2002 Optical Society of America
(060.5530) Fiber optics and optical communications : Pulse propagation and temporal solitons
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing
(190.0190) Nonlinear optics : Nonlinear optics
(190.4420) Nonlinear optics : Nonlinear optics, transverse effects in
Paul Pioger, Vincent Couderc, Laurent Lefort, Alain Barthelemy, Fabio Baronio, Costantino De Angelis, Yoohong Min, Victor Quiring, and Wolfgang Sohler, "Spatial trapping of short pulses in Ti-indiffused LiNbO3 waveguides," Opt. Lett. 27, 2182-2184 (2002)