Abstract: We present the first observation of spatiospectral control and localization of supercontinuum light through the nonlinear interaction of spectral components in extended periodic structures. We use an array of optical waveguides in a {{LiNbO}$_3$} crystal and employ the interplay between diffraction and nonlinearity to dynamically control the output spectrum of the supercontinuum radiation. This effect presents an efficient scheme for optically tunable spectral filtering of supercontinua.

Keywords: wave-guide arrays; photonic crystal fiber; gap solitons; directional-couplers; optical-fibers; laser-pulses; white-light; generation; dispersion; lattices

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