| Original Articles |
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Blue Upconversion Emission in Yb3+ and Tm3+ Codoped Lead-Germanate-Tellurite Glasses |
| YANG Zhong-Min;XU Shi-Qing;WEN Lei;JIANG Zhong-Hong |
| Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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| Cite this article: |
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YANG Zhong-Min, XU Shi-Qing, WEN Lei et al 2004 Chin. Phys. Lett. 21 1124-1127 |
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Abstract Intense blue and red upconversion emissions have been observed in Yb3+/Tm3+ co-doped 0.05 K2O-0.1ZnO-0.1BaO-0.2PbO-0.2GeO2-0.35TeO2 glasses under the pump of 976-nm laser diode. The dependence of the intensity of the upconversion emissions on the Tm3+ concentration has been studied in order to determine the ion concentration and the involved mechanism. The blue emission centred at 476 nm decreases and the 792-nm red emission increases with the increasing Tm3+ concentration. Subsequently, the dependence of upconversion emission intensity on the excitation power is investigated. It is found that the intensity ratio between the 792-nm red and 476-nm blue emissions decreases with the increasing pump energy.
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| Keywords:
71.35.Fy
78.20.-e
73.61.Jc
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Published: 01 June 2004
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| PACS: |
71.35.Fy
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78.20.-e
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(Optical properties of bulk materials and thin films)
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73.61.Jc
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(Amorphous semiconductors; glasses)
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