International Journal of Engineering and Information Systems (IJEAIS)   Year: 2019 | Volume: 3 | Issue: 10 | Page No.: 40-43 Electrical, and the Performance Coefficients for the (Rhodamine B-Fluorescein) Laser Dyes Detectors Mithaq M. Mehdy Al-Sultani, Alyaa Abd-Almehdy Al-Ramahy Abstract: In this research, some types of laser reagents induced with laser dyes (rhodamine B and fluorescein) dissolved in ethanol and polymeric (PVP) in (0.3 g) were prepared. The absorption spectrum of the used dye fluid was studied, and some reagent parameters were prepared with different concentration (10-3-104). The results of the absorption spectra showed an offset towards longer wavelengths (red shift) by increasing the molarity concentration, and the effect of the addition of the polymer material on the absorption spectra. The results also showed that the intensity and wavelength of the top of the absorption spectrum of the dyes used depend on the concentration of the dye used and the increase of the dye concentration leads to interference between the absorption spectra. Voltage - current characteristics of models prepared before laser irradiation and post irradiation were also measured. Some reagents were studied, including spectral response. The results showed that the detector has a spectral response of up to A / W (0.02) at wavelength 532 nm, while the specific detection value was (2.1 × 109 cm ).