Recent experiments that measure the effects of the photoinduced generation and transport of charge on the refractive index of polymeric films having a second-order nonlinear optical response are reported. Two approaches were taken to observe these effects. In the first approach, the photoconductive and light refraction processes were separated by confining these functions to separate layers in a multilayer structure. In the second approach, photoconduction and refraction functions were combined in the same layer. The modulation of the refractive index was then measured in response to photoconductions.