Journal
JOURNAL OF LUMINESCENCE
Volume 201, Issue -, Pages 143-147Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2018.04.050
Keywords
Crystal growth; Thermal properties; Optical properties; Energy transfer; Mid-infrared laser
Categories
Funding
- National Nature Science Foundation of China [51472240, 61675204, 11304313]
- National Key Research and Development Program of China [2016YFB0701002]
- Strategic Priority Research Programs of the Chinese Academy of Science [XDB20010200]
- State Key Laboratory of Structure Chemistry (Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science) [20160012]
- Science and Technology Plan Cooperation Project of Fujian Province [2015I0007]
- Nature Science Foundation of Fujian Province [2015J05134, 2016J01274]
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Enhanced 2.86 mu m emission corresponding to Ho3+: I-5(6) -> I-5(7) was achieved in Nd3+/Ho3+ codoped CaLaGa3O7 crystal for the first time. The detailed spectroscopic properties and energy transfer mechanism of the as-grown crystal were investigated. The results show that the Nd3+ ion is not only a very good sensitizer in a Ho3+ doped CaLaGa3O7 crystal, but also an appropriate deactivated ion with efficient depopulation of the Ho3+: I-5(7) level for enhancing the 2.86 mu m fluorescence emission. And the energy transfer efficiency of Ho3+: I-5(7) -> Nd3+: I-4(13/2) is estimated to be 93%, which indicates that the self-termination effect for the 2.86 mu m holmium laser is suppressed successfully in Nd3+/Ho3+: CaLaGa3O7 crystal. Besides, the thermal properties of Nd3+: CaLaGa3O7 crystal were also studied. In conclusion, the introduction of Nd3+ is favorable for achieving an enhanced 2.86 mu m emission in Nd3+/Ho3+: CaLaGa3O7 crystal, which can act as a new promising candidate for mid-infrared lasers.
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