We address the formation and propagation of vector solitons in optical lattices in the presence of anisotropy-induced walk-off between ordinary and extraordinary polarized field components. Stable vector solitons trapped by the lattice form above a threshold power, while decreasing the lattice depth below a critical value results in the abrupt release of the caged solitons that then move across the lattice and may get trapped in a desired lattice channel.
Kartashov, Y.V., Vysloukh, V.A., Torner, L. Walking-vector-soliton caging and releasing. "Optics letters", Juny 2009, vol. 34, núm. 11, p. 1705-1707.