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Keywords = Er-doped fluorite crystal

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10 pages, 3878 KiB  
Article
Study on Spectral Properties and Mid-Infrared Laser Performance of Er, La:CaF2 Crystals
by Zhen Zhang, Jingjing Liu, Yunfei Wang, Fengkai Ma, Shaochen Liu, Zhonghan Zhang, Jie Liu and Liangbi Su
Crystals 2024, 14(7), 639; https://doi.org/10.3390/cryst14070639 - 11 Jul 2024
Cited by 3 | Viewed by 1375
Abstract
Er3+-doped fluorite crystals, including CaF2 and SrF2, are considered as attractive laser gain materials in the mid-infrared (MIR) region with merits of high laser efficiency as well as low doping concentration. In this work, a series of Er, [...] Read more.
Er3+-doped fluorite crystals, including CaF2 and SrF2, are considered as attractive laser gain materials in the mid-infrared (MIR) region with merits of high laser efficiency as well as low doping concentration. In this work, a series of Er, La:CaF2 crystals were grown and the modulation effect of co-doping La3+ ions on the spectral properties and mid-infrared laser performance was investigated. It was found that introducing La3+ ions can effectively manipulate the coordination environment of Er3+ ions embedded in CaF2 crystal, thus modulating the shape and intensity of absorption and emission bands. On the other hand, La3+ ions can partially substitute Er3+ sites in the clusters to form mixed clusters, which affects the energy transfer processes between Er3+ ions as well as ~3 μm laser performance, which is dominated by energy transfer up-conversion (ETU) processes between Er3+ ions. By co-doping La3+ ions into Er:CaF2 crystal at an appropriate concentration, the spectral parameter modulation can be achieved while maintaining a high MIR laser efficiency. Full article
(This article belongs to the Special Issue Photoelectric Functional Crystals)
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