Evolutionary behavior of thermal and optical properties of fluoride fiberglass with Er³⁺ doping

Er 3+ ‐doped fluoride glass and fiber have been widely used in multiple fields such as mid‐infrared laser, visible laser, and amplifier. However, there is no unified conclusion on the thermal and optical properties with respect to varying concentrations of Er 3+ doping. Furthermore, this is a paucity of systematic guidance on the preparation of Er 3+ ‐doped fluoride glass and fiber. In this study, fluorozirconate fiberglass with Er 3+ doping is systematically examined. Additionally, a preliminary explanation of the evolutionary behavior of glass devitrification, thermal properties, and fluorescence properties is provided. Energy transition models were built for 1.5 and 2.7 µm emissions in Er 3+ ‐doped fluorozirconate at room temperature. Moreover, a suitable doping concentration is proposed based on the evolutionary behavior of thermal and optical properties. In this study, guidance on appropriate Er 3+ doping concentration levels in fluorozirconate glass is provided and potential applications are explored.