| 光谱学与光谱分析 |
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| Mid-Infrared Emission and Multiphonon Relaxation in Tm3+-Doped Ge-Ga-Se Glasses |
| ZHANG Peng-jun1, DAI Shi-xun1, 2*, LE Fang-da1, PENG Bo2, XU Tie-feng1, NIE Qiu-hua1, ZHANG Xiang-hua1, 3 |
1. College of Information Science and Engineering, Ningbo University, Ningbo 315211, China
2. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China
3. Laboratoire de Verres et Ceramiques, Université de Rennes Ⅰ, Rennes, France 35042 |
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Abstract A series of chalcogenide glasses based on the composition Ge30Ga5Se65 (at.%) doped with the different Tm3+ ions were synthesized by melt-quenching technique. The refractive indexes, Raman spectra, absorption spectra, near-and mid-infrared fluorescence, and lifetimes of glass samples under 800 nm laser excitation were measured. The intensity parameters Ωi(i=2, 4, 6), transition probabilities, branching ratios and radiative lifetimes have been predicted for Tm3+ ions in samples by using the Judd-Ofelt theory. The near-infrared emission spectra at 1.23, 1.48 and 1.8 μm were observed and their quantum efficiencies were evaluated respectively in glass doped with 1 Wt% Tm3+-ions under 800 nm excitation. The mid-infrared fluorescence spectra were investigated with the different Tm3+ ion concentration under 800 nm excitation. The multiphonon relaxation rate of Tm3+: 3H5→3F4 by the measured and calculated lifetimes, and the relative parameters of W(0) and α in Ge30Ga5Se65 glass were evaluated. Results show that the multiphonon relaxation rates were significantly lower than other glasses due to the lower maximum phonon energy, so the selenide glasses are promising as host materials for doping by rare earth ions and for preparation of mid-infrared optical elements.
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Received: 2009-07-02
Accepted: 2009-10-12
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Corresponding Authors:
DAI Shi-xun
E-mail: daishixun@nbu.edu.cn
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| Cite this article: |
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ZHANG Peng-jun,DAI Shi-xun,LE Fang-da, et al. Mid-Infrared Emission and Multiphonon Relaxation in Tm3+-Doped Ge-Ga-Se Glasses[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(06): 1464-1468.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2010/V30/I06/1464 |
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