Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7906187 | Optical Materials | 2018 | 7 Pages |
Abstract
Er3+ has been considered one of the most suitable sensitive ions of Ho3+ to generate 2â¯Î¼m emission. In this work, luminescent properties and energy transfer mechanism of Er3+/Ho3+ co-doped lead silicate glass were systematically investigated under 980 and 1550â¯nm excitations, respectively. Based on the absorption spectra, the Judd-Ofelt intensity parameters, absorption and emission cross sections, and gain coefficient were calculated. The emission cross section of Ho3+: 5I7 â 5I8 transition is as large as 8â¯Ãâ¯10â21â¯cm2. And the calculated maximum gain coefficient is 3.48â¯cmâ1â¯at 2010â¯nm. In addition, the energy transfer efficiency between Er3+: 4I13/2 level and Ho3+: 5I7 level can reach 89.3% when the samples were pumped by a 980â¯nm laser diode. An intense 2â¯Î¼m emission was obtained upon excitation of 1550â¯nm due to the large absorption cross section of Er3+ at 1550â¯nm and efficient energy transfer from Er3+: 4I13/2 level to Ho3+: 5I7 level. These results suggest that the Er3+/Ho3+ co-doped lead silicate glass has great potential for application as a mid-infrared laser material.
Related Topics
Physical Sciences and Engineering
Materials Science
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Authors
Guoquan Qian, Guowu Tang, Zhenguo Shi, Licheng Jiang, Kaimin Huang, Jiulin Gan, Dongdan Chen, Qi Qian, Feng Tu, Haizheng Tao, Zhongmin Yang,