  We demonstrated that spatial Kerr beam self-cleaning can be obtained in a
highly multimode multicomponent optical fiber based on lanthanum aluminum
silicate oxide glasses (SiO2-Al2O3-La2O3), which was made by using the modified
powder in tube technology (MIPT). We show how such fabrication method can
provide interesting potentialities to design doped multimode optical fibers
with homogeneous and quasi-parabolic refractive-index core profile for
nonlinear optics applications.
