| Original Articles |
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High Efficiency Infrared-to-Visible Upconversion Emission in Er3+,Yb3+, and Ho3+ Codoped Tellurite Glasses |
| DAI Shi-Xun1;ZHANG Xiang-Hua2,1;XU Tie-Feng1;SHEN Xiang1;WANG Xun-Shi1;NIE Qiu-Hua1 |
| 1College of Information Science and Engineering, Ningbo University, Ningbo 315211
2Université de Rennes I, Rennes, France 35042 |
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| Cite this article: |
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DAI Shi-Xun, ZHANG Xiang-Hua, XU Tie-Feng et al 2006 Chin. Phys. Lett. 23 1810-1812 |
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Abstract A novel method of codoping the Er3+, Yb3+, and Ho3+ ions in tellurite glasses is demonstrated to obtain a high efficiency of infrared-to-visible upconversion. Three intense emission bands observed in Er3+, Yb3+, and Ho3+ codoped tellurite glasses centred at 525, 547, and 657nm correspond to Er3+: 2H11/2 → 4I15/2, Er3+: 4S3/2 → 4I15/2+Ho3+: 5S2(5F4) → 5 I8, and Er3+: 4 S3/20 → 4I15/2+Ho3+: 5F5 → 5I8 transitions, respectively. No visible upconversion quenching phenomenon is observed when three rare-earth ions are codoped together in tellurite glasses. In contrast, the upconversion intensity of red and green emissions in Er3+, Yb3+, and Ho3+ codoped glasses is enhanced largely when compared with Er3+/Yb3+-codoped glasses. The dependence of upconversion intensities on excitation power and the possible upconversion mechanisms are evaluated. The three emissions are based on two-photon absorption processes.
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| Keywords:
42.70.Ce
42.70.Hj
78.20.-e
78.55.-m
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Published: 01 July 2006
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| PACS: |
42.70.Ce
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(Glasses, quartz)
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42.70.Hj
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(Laser materials)
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78.20.-e
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(Optical properties of bulk materials and thin films)
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78.55.-m
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(Photoluminescence, properties and materials)
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