Abstract
Abstract In this work, Judd–Ofelt analysis is applied to an extensive series of Er 3+ -doped and Er 3+ , Yb 3+ -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 Ω 2 , Ω 4 and Ω 6 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 4 I 13 / 2 → 4 I 15 / 2 transition is determined. Photoluminescence (PL) and its decay behaviour studies were carried out for the transition 4 I 13 / 2 → 4 I 15 / 2 .
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