RB and MV, two organic laser dyes, were prepared in an ethanol solvent usingmixing ratios (3:1) and varying concentrations (2×10-6, 4×10-6, 6×10-6, and 8×10-6) M of the two dyes, Rhodamine B and Methyl violet (10B). A study of the UV-VIS spectra of varied concentrations of each dye dissolved in absolute ethanol solvent, and then the absorption and transmission spectra of all samples were conducted. Fluorescence spectroscopy was used to examine the spectrum optical characteristics of all the manufactured samples. The findings indicated that for the same wavelength, when concentrations rose, absorbance rose as well. Transmittance showed the exact opposite connection.The nonlinear refractive index (n2) and nonlinear absorption coefficient (β) of prepared samples were determined using the Z-Scan method in both Close and Open aperture. For these tests, a diode pump solid state laser with a wavelength and power of 457 nm was used (84 mW). According to the findings, the refractive index increased while the nonlinear absorption coefficient decreased with increasing concentrations of the material. The optical limiter is used to protect the human eye from the high powers of the laser.

Optical Limiting, Nonlinear Refractive Index, Organic Laser Dyes