Erbium doped P 2 O 5 -BiF 3 -MgO-ZnO-KF glasses for green laser applications

• Published in: Physica scripta 2025-01, Vol.100 (1), p.15996
• Main Authors: Jamalaiah, B C, Rao, K Venkata, Sagar, S Vidya, Balanarayana, C, Srihari, N V, Khan, P Shahab
• Format: Article
• Language: English
• ISSN: 0031-8949; 1402-4896
• DOI: 10.1088/1402-4896/ad9fb9

A series of oxyfluorophosphate glasses with the composition (60- x ) P 2 O 5 + 10 BiF 3 +10 MgO + 10 ZnO + 10 KF + x Er 2 O 3 (0 ≤ x ≥ 2.0 mol%) were prepared using conventional melt quenching method. The amorphous phase of studied glass samples was examined through powder x-ray diffraction. The optical properties were determined using UV–vis-NIR absorption, photoluminescence excitation and emission spectra. The radiative properties were determined using Judd–Ofelt and Fuchtbauer-Ladenburg theories. The optimal Er 3+ doping concentration for efficient emission was determined by analysing the emission spectra under 377 nm excitation. The emission spectra of studied glasses exhibited characteristic emission bands of Er 3+ ions corresponding to the 2 H 11/2 → 4 I 15/2 (529 nm), 4 S 3/2 → 4 I 15/2 (545 nm) and 4 F 9/2 → 4 I 15/2 (684 nm) transitions. At higher Er 3+ doping levels, the emission bands shift towards longer wavelengths showing a red shift. Upon 980 nm excitation for upconversion, the Er 3+ ions emitted intense green luminescence through the 4 S 3/2 → 4 I 15/2 (545 nm) transition. The applicability of studied glasses for the fabrication of green laser sources was discussed. The glass system containing 0.5 mol% of Er 3+ ions was identified to be the optimal choice for designing green laser sources.