1. Growth, structure, and spectroscopic properties of a Cr3+, Tm3+, Ho3+, and Pr3+co-doped LuYAG single crystal for 2.9 μm laser
- Author
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Fang Peng, Dunlu Sun, Shaotang Yin, Zhongqing Fang, Maojie Cheng, Xuyao Zhao, Jianqiao Luo, Qingli Zhang, Qiang Guo, and Huili Zhang
- Subjects
Rietveld refinement ,Chemistry ,Analytical chemistry ,02 engineering and technology ,General Chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Laser ,01 natural sciences ,Fluorescence ,law.invention ,Ion ,010309 optics ,Crystal ,law ,Excited state ,0103 physical sciences ,General Materials Science ,Absorption (chemistry) ,0210 nano-technology ,Single crystal - Abstract
A new laser crystal from Lu2.4Y0.6Al5O12 (LuYAG) co-doped with Cr3+, Tm3+, Ho3+, and Pr3+ ions was grown successfully by the Czochralski method for the first time. The structure parameters of the Cr,Tm,Ho,Pr:LuYAG crystal are determined by the X-ray Rietveld refinement method. The main absorption bands are observed near 426 and 782 nm, and the fluorescence spectrum excited by a 450 nm or 783 nm LD presents an emission band near 2.911 μm, indicating that the co-doped Cr3+ and Tm3+ ions can be utilized as sensitizers for the Ho3+ ions. The lifetimes of the 5I6 and 5I7 levels of the Ho3+ ions were measured and fitted to be 0.070 ms and 1.852 ms, respectively. The energy transfer efficiencies of the processes 5I6 (Ho3+) → 3F3,4 (Pr3+) and 5I7 (Ho3+) → 3F2 (Pr3+) + 3H6 (Pr3+) were calculated, showing that the Pr3+ ions can play the role of a deactivator for the Ho3+ ions. Furthermore, the energy transfer mechanisms among the Cr3+, Tm3+, Ho3+, and Pr3+ ions were studied. The results suggest that the Cr,Tm,Ho,Pr:LuYAG crystal is a new promising laser medium operating at around 2.9 μm under flash lamp or 783 nm LD pumping.
- Published
- 2016
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