  We present a numerical study on the light transport properties which are
modulated by the disorder strength in quasi-one-dimensional disordered
waveguide which consists of periodically arranged scatterers with random
dielectric constant. The transport mean free path is found to stay inversely
proportional to the square of the relative fluctuation of the dielectric
constant as in the 1D and 2D cases but with . The transport properties of light
through a sample with a fixed size can be modulated from ballistic to localized
regime as well, and a generalized scaling function is defined to determine the
light transport status in such a sample. The calculation of the diffusion
coefficient and the energy density profile of the most transmitted eigenchannel
clearly exhibits the transition of transport behaviour from diffusion to
localization.
