Design of high gain optical Amplifier materials by control of 4f erectronic transition probability of rare earth doped glasses

控制稀土掺杂玻璃4f电子跃迁概率的高增益光放大器材料设计

• 批准号: 08650989
• 负责人: HANADA Teiichi
• 金额: $ 1.41万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650989/
• 关键词: Rare earth; Glass; Optical amplifier; Optical telecommunication; 4f electrons; Optical fiber; 光学遷移

In order to develop the glass materials for optical amplifiers at 1.5mum and 1.3mum wavelengths, which are used in fiber telecommunications, Er^<3+>, Pr^<3+>, or Dy^<3+> ions were doped in several glasses and their host dependence of optical properties were investigated. Firstly the Judd-Ofelt intensity parameters, local structure and 1.5mum luminescence characteristics of Er^<3+> ions were investigated in the aluminosilicate glasses with various aluminum contents. Radiative decay rate from ^4I_<13/2> level was determined by Judd-Ofelt analyzes and nonradiative decay rate was obtained combined with the lifetime measurement. With increasing Al_2O_3 content the multiphonon decay rate decreased, which could be explained by the decrease of electron-phonon coupling strength observed in the phonon sideband spectra, whereas the emission probability of ^4I_<13/2>*^4I_<15/2> increased Accordingly the quantum efficiency of 1.5mum emission were enhanced from 70% to almost 90%. The results are dis … More cussed in terms of the change in the local structure and orbital electron density of Er^<3+> ions with the structural evolution of the glass.Concentration and temperature dependences of fluorescence of Pr^<3+> : ^1G_4*^<>H_5 and Yb^<3+> : ^2F_<5/2>*^2F_<7/2> were investigated in tellurite glasses doped with up to 6mol% Yb_2O_3. By 970nm pumping, the 1.3mum emission of Pr^<3+> was sensitized.The lifetime obtained by 1.02mum emission from the Yb^<3+>ions at room temprature was insensitive to the Yb_2O_3 concentration in singly doped glasses. However, the Yb-life-time showed strong concentration quenching with the presence of only 0.1mol% Pr_2O_3. The energy transfer efficiency from Yb to Pr in a codoped glass was found to be more than 90% even in the glass of[Yb]/[Pr]>100. The Yb-lifetime in singly doped glass increased and that in codoped glass decreased with increasing temperature. These results can be explained by assuming rapid energy migration between Yb ions and promotion of Yb^<3+>・^2F_<5/2>*Pr^<3+> : ^1G_4 transfer at higher temperature. Less

为了开发用于光纤通信的1.5 μ m和1.3 μ m波长光放大器的玻璃材料，在几种玻璃中掺杂了Er^<3+>、Pr^<3+>或Dy^<3+>离子，并研究了它们的光学性质与基质的关系。首先研究了不同铝含量的铝硅酸盐玻璃中Er^<3+>离子的Judd-Ofelt强度参数、局域结构和1.5 μ m发光特性。用Judd-Ofelt分析法测定了^4I <13/2>能级的辐射衰变率，结合寿命测量得到了无辐射衰变率。随着Al_2O_3含量的增加，多声子衰减率降低，这是由于声子边带谱中电子-声子耦合强度降低所致，而^4I_（13/2）*^4I_（15/2）的发射几率增加，相应地，1.5 μ m发射的量子效率从70%提高到近90%。结果显示， ...更多信息 研究了Pr^<3+>：^1G_4*^<>H_5和Yb^<3 +>：^2F_（5/2>*^2F_（7/2）在掺Yb_2O_3至6mol%的碲酸盐玻璃中荧光的浓度和温度依赖性。在970 nm泵浦下，Pr^<3+>的1.3 μ m发射被敏化，Yb^<3+>离子的1.02 μ m发射在室温下获得的寿命对单掺玻璃中Yb_2O_3的浓度不敏感。而当Pr_2O_3的浓度为0.1mol%时，Yb的寿命表现出强烈的浓度猝灭。在[Yb]/[Pr]>100的共掺杂玻璃中，Yb到Pr的能量转移效率大于90%。随着温度的升高，单掺玻璃中Yb的寿命增加，而共掺玻璃中Yb的寿命降低。这些结果可以通过假设Yb离子间的能量快速迁移以及在较高温度下Yb^<3+>·^2F_<5/2>*Pr^<3+>：^1G_4转移的促进作用来解释。少

项目成果

田部 勢津久、: "希土類アルミネート系蓄光性蛍光体の出現とその光物性"" 「ニューセラミック」. 9[10]. 27-33 (1996)

Setsuhisa Tabe：“稀土铝酸盐荧光粉的出现及其光学特性”，《新陶瓷》9[10]。

田部 勢津久: "「希土類の科学」" 化学同人(編 足立吟也、分担執筆)(印刷中), (1998)

Setsuhisa Tabe：“稀土科学” Kagaku Doujin（编者：Ginya Adachi，合著者）（正在出版），（1998）

田部 勢津久: "Dy^<3+>含有低フォノンエネルギーガラスによる′1.3μm光増幅器の可能性″" 「化学と工業」. 49[1]. 54-54 (1996)

Setsuhisa Tabe：“使用含 Dy^3+ 的低声子能量玻璃的 1.3 μm 光学放大器的可能性”，“化学与工业”49[1]（1996）。

S.Tanabe: ""Branching ratio of uv and blue upconversions of Tm^<3+> ions in glasses"" Phys.Review. B53[13]. 8358-62 (1996)

S.Tanabe：“玻璃中 Tm^3 离子的紫外和蓝色上转换的分支比”Phys.Review。

S.Tanabe,: "Properties of Classes and Rare-earth Doped Glasses for Optical Fibers" Institue for Electrical Engineers(IEEE),London, (eds. D.W. Hewak)(in press), (1998)

S.Tanabe，：“光纤类和稀土掺杂玻璃的特性”电气工程师协会 (IEEE)，伦敦，（D.W. Hewak 编辑）（印刷中），（1998 年）