| Original Articles |
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Structural and Upconversion Fluorescence Properties of Er3+/Yb3+-Codoped Lead-Free Germanium-Bismuth Glass |
| SUN Hong-Tao1,2;ZHANG Li-Yan1;DUAN Zhong-Chao1,2;YU Chun-Lei1,2;ZHANG Jun-Jie1;Dai Shi-Xun1;HU Li-Li1;JIANG Zhong-Hong1 |
| 1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
1Graduate School of the Chinese Academy of Sciences, Beijing 100039 |
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| Cite this article: |
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SUN Hong-Tao, ZHANG Li-Yan, DUAN Zhong-Chao et al 2005 Chin. Phys. Lett. 22 1249-1252 |
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Abstract We study the structural and infrared-to-visible upconversion fluorescence properties of Er3+/Yb3+-codoped lead-free germanium-bismuth glass. The structure of lead-free germanium-bismuth-lanthanum glass is investigated by peak-deconvolution of Raman spectroscopy. Intense green and red emissions centred at 525, 546, and 657nm, corresponding to the transitions 2H11/2→4I15/2, 4S3/2→4I15/2, and 4F9/2→4I15/2, respectively, are observed at room temperature. The quadratic dependence of the 525, 546, and 657nm emissions on excitation power indicates that a two-photon absorption process occurs under 975nm excitation.
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| Keywords:
78.20.-e
42.70.Ce
42.70.Hj
32.70.Cs
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Published: 01 May 2005
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| PACS: |
78.20.-e
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(Optical properties of bulk materials and thin films)
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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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32.70.Cs
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(Oscillator strengths, lifetimes, transition moments)
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