We have obtained stationary bright spatial solitons in a planar photorefractive strontium barium niobate waveguide for visible light ranging from 514.5 to 780 nm. Even for larger wavelengths (λ=1047 nm) strong self-focusing of the beam was observed; however, input power had to be some orders of magnitude higher than for visible light for self-focusing to occur. Furthermore, we found transient self-trapping of red light (λ=632.8 nm) that corresponds to the formation of bright quasi-steady-state solitons.
© 1998 Optical Society of America
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.5530) Fiber optics and optical communications : Pulse propagation and temporal solitons
(090.2890) Holography : Holographic optical elements
(130.0130) Integrated optics : Integrated optics
(190.5330) Nonlinear optics : Photorefractive optics
D. Kip, M. Wesner, V. Shandarov, and P. Moretti, "Observation of bright spatial photorefractive solitons in a planar strontium barium niobate waveguide," Opt. Lett. 23, 921-923 (1998)