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1.5MUM和1.3MUM波长的光学放大器的玻璃材料，这些玻璃材料用于纤维电信，ER^<3+>，pr^<3+>或Dy^<3+>离子被掺杂，以多个眼镜掺杂，并研究了其光学特性的宿主依赖性。首先，在具有各种铝含量的铝纤维硅酸盐玻璃中研究了ER^<3+>离子的Judd-felt强度参数，局部结构和1.5MUM发光特性。通过Judd-ofelt分析确定了 ^4i_ <13/2>水平的辐射衰减率，并获得了非辐射衰减率与寿命测量结合。随着AL_2O_3含量的增加，多形衰减速率下降，这可以通过在声子侧带光谱中观察到的电子偶联强度的降低来解释，而 ^4i_ <13/2>* ^4i_ <15/2>的排放概率可根据1.5mum Essions的量化效率增强，从而增加了1.5mum Essions的量子增强。结果是……更加因玻璃的结构演变而在局部结构和轨道电子密度变化方面更加引起。最多6mol％yb_2o_3。到970nm泵送时，pr^<3+>的1.3MUM发射敏感。室温下从Yb^<3+离子发射1.02mum发射的寿命对单粘玻璃中的YB_2O_3浓度不敏感。但是，YB生活时间显示出强浓度，仅存在0.1mol％pr_2o_3。即使在[yb]/[pr]> 100的玻璃杯中，也发现从YB到PR的能量传递效率也超过90％。单一掺杂玻璃中的YB千年化发生量增加，并且随着温度的升高，辅助玻璃中的YB寿命会降低。这些结果可以通过假设Yb离子之间的快速能量迁移以及Yb^<3+> ・^2f_ <5/2>*pr^<3+>：^1G_4在较高温度下转移。较少的

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

S.Tanabe：“光纤用玻璃和稀土掺杂玻璃的特性”，伦敦电气工程师协会 (IEEE)，（eds.D.W.Hewak）（正在出版），（1998 年）