1. Improved 2.79 μm continuous-wave laser performance from a diode-end pumped Er,Pr:CaF2 crystal.
- Author
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Ma, Weiwei, Su, Liangbi, Xu, Xiaodong, Wang, Jingya, Jiang, Dapeng, Zheng, Lihe, Liu, Jingjing, Fan, Xiuwei, Liu, Jie, and Xu, Jun
- Subjects
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CRYSTALS , *SINGLE crystals , *CLUSTERING of particles , *FLUORESCENCE , *NEAR infrared radiation - Abstract
The spectral properties of lightly doped Er:CaF 2 and Er,Pr:CaF 2 single crystals were investigated. Benefited from particular clustering effect, 2.79 μm continuous-wave (CW) laser operation was demonstrated in lightly doped 3 at.% Er:CaF 2 crystal. After co-doping small amount of Pr 3+ , the lifetime gap between Er 3+ : 4 I 11/2 and Er 3+ : 4 I 13/2 was shortened from 7.86 ms to about 1 ms. Moreover, the near-infrared and up-conversion fluorescence were significantly quenched. Thus, the CW laser performance was greatly improved. The slope efficiency was effectively improved from 8.0% to 15.8%. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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