Investigation of the Nonlinear Optical Response of 3- (Dimethylamino)-7-Aminophenothiazin-5-Ium Chloride Dye

The nonlinear optical properties of 3-(Dimethylamino)-7-aminophenothiazin-5-ium chloride dye in the solvent chloroform was studied by Diffraction ring technique using cw diode laser at 532 nm.The obtained results for the nonlinear refractive index, 2 n , and the thermo-optic coefficients , dT dn , are found to be of the order of W cm / 10 2 7  and 1 5 10   k respectively.To solidate the present experimental results the diffraction ring patterns are reproduced theoretically based on a well known simple model.The rings number of each pattern variation with power agree well with the experimental findings.These results indicate that the azo dye is a promising candidate for applications in nonlinear optical devices.