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Tm3+掺杂SiO2-Al2O3-PbF2-AlF3玻璃的光谱特性
引用本文:林琼斐,夏海平,王金浩,张约品,杨钢锋,张勤远.Tm3+掺杂SiO2-Al2O3-PbF2-AlF3玻璃的光谱特性[J].光学学报,2008,28(2):305-310.
作者姓名:林琼斐  夏海平  王金浩  张约品  杨钢锋  张勤远
作者单位:1. 宁波大学光电子功能材料重点实验室,浙江,宁波,315211
2. 华南理工大学光通信材料研究所特种功能材料教育部重点实验室,广东,广州,510640
基金项目:浙江省自然科学基金(Y406220),宁波市博士基金(2005A610010,2005610023)资助课题
摘    要:用高温熔融法制备了不同Tm3 摩尔分数掺杂的摩尔分数比为0.3(SiO2)…0.1(Al2O3)…0.1(AlF3)…0.5(PbF2)…x(Tm2O3)(摩尔分数x=0.5%,1.0%,2.0%,3.0%)玻璃。从吸收光谱特性出发,应用Judd-Ofelt理论,计算得到了Tm3 的J-O强度参量(Ω2,Ω4,Ω6)及Tm3 各激发能级的自发辐射跃迁概率、荧光分支比以及辐射寿命等光谱参量。在808nm波长的激光二极管激发下,研究了不同Tm3 掺杂摩尔分数下玻璃在约1.47μm与约1.8μm处的荧光特性,在掺杂摩尔分数约达到2.0%时,在1.8μm处的荧光强度达最大,然后随着掺杂摩尔分数的增大,其荧光强度反而降低。作者从Tm3 的交叉弛豫与摩尔分数猝灭效应解释了这一荧光强度变化的规律,同时,根据McCumber理论计算了Tm3 跃迁3H6→3F4的吸收截面和跃迁3F4→3H6的受激发射截面。

关 键 词:光学材料  掺铥氟氧化物玻璃  光谱性质  交叉弛豫效应
收稿时间:2007/5/21

Spectral Properties of Tm3+-Doped SiO2-Al2O3-PbF2-AIF3 Glasses
Lin Qiongfei,Xia Haiping,Wang Jinhao,Zhang Yuepin,Yang Gangfeng,Zhang Qinyuan.Spectral Properties of Tm3+-Doped SiO2-Al2O3-PbF2-AIF3 Glasses[J].Acta Optica Sinica,2008,28(2):305-310.
Authors:Lin Qiongfei  Xia Haiping  Wang Jinhao  Zhang Yuepin  Yang Gangfeng  Zhang Qinyuan
Abstract:Glasses with the compositions of 0.3SiO2-0.1Al2O3-0.1AlF3-0.5PbF2 doped with different Tm3+ concentration (x=0.5 mol%,1.0 mol%,2.0 mol%,3.0 mol%) were fabricated by conventional melting method. According to the absorption spectra and the Judd-Ofelt theory, the J-O strength parameters (Ω2,Ω4,Ω6) of Tm3+ were calculated, by which the radiative transition probabilities, fluorescence branching ratios and radiative lifetimes were obtained. The infrared emission spectra (with 808 nm laser diode excitation) at ~1.47 μm and ~1.8μm of various concentration Tm3+-doped glasses were studied. The emission intensity at 1.8 μm reaches to the maximum when the Tm3+-doping concentration is near to be 2.0 mol% and then decreases at higher concentration. The mechanism of the change of the fluorescence intensity was explained from the cross-relaxation effect and the concentration quenching effect of Tm3+. The absorption cross section of 3H6→3F4 transition and the stimulated emission cross section of 3F4→3H6 transition of Tm3+ have also been calculated according to McCumber theory.
Keywords:optical materials  Tm~(3 )-doped oxyfluoride glasses  spectral properties  cross relaxation effect
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