Spectroscopic properties of Er3+ and Yb3+ doped phosphate–borate glasses

In this work, Judd–Ofelt analysis is applied to an extensive series of Er3+-doped and Er3+, Yb3+-codoped in phosphate–borate glass in order to evaluate their potential as both glass laser systems and amplifier materials. A spectroscopic investigation is presented.The phenomenological Judd–Ofelt parameters Ω2, Ω4 and Ω6 are determined for both rare-earth ions together with their quality factors and compared to the equivalent parameters for other host glasses. The absorption cross section for the 4I13/2→4I15/24I13/2→4I15/2 transition is determined. Photoluminescence (PL) and its decay behaviour studies were carried out for the transition 4I13/2→4I15/24I13/2→4I15/2.

► We have prepared a new Er-doped and Er/Yb-codoped borate–phosphate glasses.
► The effects of spectroscopic factor modifiers on spectroscopic properties were studied.
► The nanocrystallites in our material, is against the fact of phonon energy of borate.
► In this paper we have shown stretched exponential (SE) decays in our glasses.