Gamma Irradiation Effect on Nonlinear characterization of Congo film for application in optical limiting

Hussain Ali Badran, Mustefa M. Jafer

The influence of gamma irradiation on the nonlinear optical properties of Congo dye films prepared by casting method has been reported. The single beam Z-scan technique was used to determine the nonlinear optical properties of the Congo dye doped polymer film. The experiments were performed using cw SDL laser with a wavelength of 532 nm. This material exhibits a negative optical nonlinearity. Optical limiting characteristics of the polymer film were studied. The result reveals that Congo dye doped polymer film can be a promising material for optical limiting applications.