Structural, dielectric and optical properties of Ta2O5-Bi2O3-P2O5 phosphate glasses Mohamed Laourayed, Yasmina Alaoui, Asmae Er-rafai, Mouad El Mouzahim, Mouloud El Moudane, Mohammed Abid, Mestapha Beraich, Abdellah Guenbour and Abdelkbir Bellaouchou Eur. Phys. J. Appl. Phys., 97 (2022) 49 Published online: 12 August 2022 DOI: 10.1051/epjap/2022220138