Optical and Structural Properties of Er3+ Ions Doped Al-Na-K-Ba Phosphate Glasses

Er3+-doped Na-Al-K-Ba phosphate glasses were prepared by conventional melt quenching technique. The structure was studied using XRD and it showed that all the samples were in amorphous form. Physical properties such as density and refractive index have been measured. While the dielectric studies were carried out using (KEYSIGHT-E4991B) over a wide range of frequency extending from 1 MHz up to 1GHz (106 up to 109 Hz) at room temperature (RT). The absorbance spectra were measured and The Judd-Ofelt analysis has been carried out, hence the radiative properties of 4I13/2 -> 4I15/2 transition were obtained. High radiative and experimental lifetime for the Er3+ ions has been detected. The experimental lifetime and quantum efficiency found to be decreased with increasing Er3+ content. These results obviously indicate that the present glasses may be promising for optical amplifiers as well as laser applications around 1522 nm.