In order to reduce high external voltage application and intense light incidence necessary for driving the photorefractive (PR) polymers, corona poling was newly examined during the film casting process through achieving a well-developed uniaxial orientation of non-linear optic molecules dispersed molecularly in the polymer film. When this technique was combined with our previously reported high temperature casting method, almost the twice large diffractivity of more than 14% with a high response speed of 55 ms was obtained under a relatively moderate applied field of 60 V/mu m and low light incidence of 200 mW/cm(2).