Optically controlled delay lines by pulse self-trapping in parametric waveguides with distributed feedback

Quadratically nonlinear waveguides are studied in the presence of a Bragg g rating resonant with one of the involved frequencies. In the case of second -harmonic generation and distributed feedback at the fundamental, we invest igate the existence and features of tno-color gap-solitary waves, focusing on controlling their propagation speed. This leads to the conception of opt ically controlled delay lines and retiming schemes for pulse streams in com munication systems.