用于中红外激光器的Er(3+)/Yb(3+)/Pr(3+):SrGdGa3O7晶体的光谱特性评估

Evaluation of spectroscopic properties of Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7 crystal for use in mid-infrared lasers.

作者信息

Xia Houping, Feng Jianghe, Wang Yan, Li Jianfu, Jia Zhitai, Tu Chaoyang

机构信息

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou 350002, PR China.

University of Chinese Academy of Sciences, Beijing 100039, PR China.

出版信息

Sci Rep. 2015 Sep 15;5:13988. doi: 10.1038/srep13988.

DOI:10.1038/srep13988

PMID:26369289

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4570185/

Abstract

Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7 crystal was firstly grown by Czochralski method. Detailed spectroscopic analyses of Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7 were carried out. Besides better absorption characteristic, the spectra of Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7 show weaker up-conversion and near-infrared emissions as well as superior mid-infrared emission in comparison to Er(3+): SrGdGa3O7 and Er(3+)/Yb(3+): SrGdGa3O7 crystals. Furthermore, the self-termination effect for Er(3+) 2.7 μm laser is suppressed successfully because the fluorescence lifetime of the (4)I(13/2) lower level of Er(3+) decreases markedly while that of the upper (4)I(11/2) level changes slightly in Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7 crystal. The sensitization effect of Yb(3+) and deactivation effect of Pr(3+) ions as well as the energy transfer mechanism in Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7 crystal were also studied in this work. The introduction of Yb(3+) and Pr(3+) is favorable for achieving an enhanced 2.7 μm emission in Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7 crystal which can act as a promising candidate for mid-infrared lasers.

摘要

采用提拉法首次生长出了Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7晶体。对Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7进行了详细的光谱分析。与Er(3+): SrGdGa3O7和Er(3+)/Yb(3+): SrGdGa3O7晶体相比，Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7的光谱除了具有更好的吸收特性外，还表现出较弱的上转换和近红外发射以及优异的中红外发射。此外，在Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7晶体中，Er(3+) 2.7μm激光的自终止效应得到了成功抑制，因为Er(3+)的(4)I(13/2)较低能级的荧光寿命显著降低，而较高的(4)I(11/2)能级的荧光寿命变化较小。本文还研究了Yb(3+)的敏化作用、Pr(3+)离子的猝灭作用以及Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7晶体中的能量转移机制。Yb(3+)和Pr(3+)的引入有利于在Er(3+)/Yb(3+)/Pr(3+): SrGdGa3O7晶体中实现增强的2.7μm发射，该晶体有望成为中红外激光器的候选材料。