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Frequency Upconversion Fluorescence Emission of Er3+-Doped Oxychloride Germanate Glass |
| SUN Hong-Tao1,2;ZHANG Li-Yan1;ZHANG Jun-Jie1;DAI Shi-Xun1;YU Chun-Lei1,2;HU Li-Li1;JIANG Zhong-Hong1 |
| 1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Graduate School of the Chinese Academy of Sciences, Beijing 100049 |
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| Cite this article: |
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SUN Hong-Tao, ZHANG Li-Yan, ZHANG Jun-Jie et al 2005 Chin. Phys. Lett. 22 952-955 |
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Abstract Frequency upconversion fluorescence property of Er3+-doped oxychloride germanate glass is investigated. 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, were simultaneously 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 laser diode (LD) excitation. The Raman spectrum investigation indicates that oxychloride germanate glass has the maximum phonon energy at ～805cm°C. The thermal stability of this oxychloride germanate glass is evaluated by differential scanning calorimetry, and thermal stability factor ΔT(ΔT = Tx-Tg) is 187°C. Intense upconversion luminescence and good thermal stability indicate that Er3+-doped oxychloride germanate glass is a promising upconversion laser material.
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| Keywords:
78.20.-e
42.70.Ce
42.70.Hj
32.70.Cs
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Published: 01 April 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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