Linear and Nonlinear Optical Properties of the Dye Laser (Acridine Dye)

The spectral characteristics and the nonlinear optical properties of the laser dye acridine has been determined. The spectral characteristics are studied by recording their absorption and fluorescence spectra. The nonlinear optical properties were measured by z-scan technique, using Q-switched Nd: YAG laser with 532 nm wavelength. The results showed that the optimum concentration is responsible for increasing the absorption and the emission bandwidth to full range by the energy transfer process, also the efficiency of the process was increased by increasing the concentration. The obtained nonlinear properties results of the acridine dye showed a negative nonlinear refractive index and tow photon absorption. All the nonlinear optical parameters are linearly dependent with concentration. The origin of optical nonlinearity in the dye may be attributed to laser-heating induced nonlinear effect.