ABSTRACT
We propose a method for direct observation of the spatial distribution of electric field in the bulk of lithium niobate (LN) single crystals. The experimental configuration allows revealing simultaneously domain kinetics due to polarization reversal. The complex analysis of the evolution of spatial field distribution and the stages of domain kinetics during polarization reversal in LN crystals with inhomogeneous modification of the bulk conductivity enables revealing the 3D growth of the charged domain walls. It opens new opportunities for creation of the charged domain walls in the single crystals of LN family.