Light self trapping in polymeric media based on polymethylmethacrylate with distributed phenanthrenequinone molecules Among the optical effects that are intensively investigated in recent decades is the phenomenon of self action of light beams in nonlinear optical media which is characterized by a refractive index depending on the intensity of the light wave (e.g. self trapping and self focusing of optical beams self phase modulation of optical pulses etc.). The interaction of the light with a nonlinear material allows to realize the direct optical conversion of images and to control the space time light structure. The formations of localized spatial structures so called optical solitons which are solutions of the nonlinear differential equations describing such phenomena are the focus of scientific and practical interest [1 6]. The reason for these intensive studies of solitons is the possibility of their use in modern communication systems like high speed systems of fiber optical information transfer including self trapping structure formation due to nonlinear optical effects creation of waveguiding optical elements with tunable characteristics etc. Owing to diffraction a collimated beam of light with a diameter d usually spreads with an angle of  d. However already almost 50 years ago it was found that this spreading could be avoided in a nonlinear optical medium which possesses an intensity dependent index of refraction that increases with light intensity [7 9]. As a result the beam forms a dielectric waveguide for itself with solitons as self trapping solutions.