Linear and Nonlinear Optical Properties of Acridine Dye Doped PMMA Polymer

The single beam Z-scan technique was used to determine the nonlinear optical properties of the Acridine dye doped polymer film. The experiments were performed using Q-switched Nd: YAG laser with 532 nm wavelength. The nonlinear absorption coefficient is calculated using the open aperture Z-scan data, while its nonlinear refractive index is measured using the closed aperture Z-scan data, the closed aperture Z-scan data indicates that the sign of the refraction nonlinearity is negative, i.e. self-defocusing while the open aperture Z-scan data indicates that tow photon absorption coefficient. All the nonlinear optical parameters are linearly dependent with concentration.