Broadband waveguiding through light-emitting strips directly written in a blank lithium fluoride crystal with a femtosecond laser is reported.Light guiding was observed at several opticalwavelengths,from blue,458nm,to near-infrared,at 1550nm.Visible photoluminescence spectra of the optically active F2 and F3+ color centers produced by the fs laser writing process were measured.The wavelength-dependent refractive index increase was estimated to be in the order of 10-3-10-4 in the visible and near-infrared spectral intervals,which is consistent with the stable formation of point defects in LiF.