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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (6): 935-941.DOI: 10.16553/j.cnki.issn1000-985x.2025.0022

• 研究论文 • 上一篇    下一篇

微下拉法Er∶CNGG晶体的生长及光谱性能研究

陈子航1,2(), 王晓丹1(), 刘坚2, 刘鹏2, 徐晓东2(), 徐军3   

  1. 1.苏州科技大学物理科学与技术学院,太湖光子中心前沿技术研究院,江苏高校智能光电子器件与芯片重点实验室,苏州 215009
    2.江苏师范大学物理与电子工程学院,徐州 221116
    3.同济大学物理科学与工程学院,上海 200092
  • 收稿日期:2025-02-04 出版日期:2025-06-20 发布日期:2025-06-23
  • 通信作者: 王晓丹,博士,教授。E-mail:xiaodanwang@mail.usts.edu.cn;徐晓东,博士,教授。E-mail:xdxu79@jsnu.edu.cn
  • 作者简介:陈子航(2000—),男,山西省人,硕士研究生。E-mail:2211111005@post.usts.edu.cn
  • 基金资助:
    国家重点研发计划(2023YFB3507404);江苏省“十四五”光学工程重点学科项目(2021135)

Growth and Spectral Properties of Er∶CNGG Crystals by the Micro-Pulling-Down Method

CHEN Zihang1,2(), WANG Xiaodan1(), LIU Jian2, LIU Peng2, XU Xiaodong2(), XU Jun3   

  1. 1.Key Laboratory of Intelligent Optoelectronic Devices and Chips of Jiangsu Higher Education Institutions,Advanced Technology Research Institute of Taihu Photon Center,School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,China
    2.School of Physics and Electronic Engineering,Jiangsu Normal University,Xuzhou 221116,China
    3.School of Physical Science and Engineering,Tongji University,Shanghai 200092,China
  • Received:2025-02-04 Online:2025-06-20 Published:2025-06-23

摘要: 采用微下拉法生长出掺杂浓度(原子数分数)为0.3%、2.0%、3.0%和5.0%的Er∶CNGG晶体。X射线衍射(XRD)测试表明Er∶CNGG晶体属于立方晶系。测试了Er∶CNGG晶体的吸收光谱、荧光光谱和荧光衰减曲线。5.0%Er∶CNGG晶体在968 nm处的吸收系数为1.70 cm-1,半峰全宽(FWHM)为17.5 nm,可有效匹配商用激光二极管泵浦源。5.0%Er∶CNGG晶体最强发射峰位于2 709 nm,对应的FWHM为17.3 nm。计算得到0.3%、2.0%、3.0%和5.0%的Er∶CNGG晶体4I13/2能级寿命分别为5.97、6.30、6.46和5.73 ms。研究结果表明高浓度Er∶CNGG晶体是一种有潜力的2.7 μm波段激光增益介质。

关键词: Er∶CNGG; 微下拉法; 晶体生长; 光谱性能; 2.7 μm; 激光增益介质

Abstract: Er∶CNGG crystals with the doping concentration (atomic fraction) of 0.3%, 2.0%, 3.0% and 5.0% were grown by the micro-pulling-down method. The crystal structure was tested by X-ray diffraction (XRD), and the results show that the crystal structure is cubic. The absorption spectra, fluorescence spectra and fluorescence decay curves of Er∶CNGG crystals were measured at room temperature. The absorption coefficient of 5.0% Er∶CNGG crystal is 1.70 cm-1 at 968 nm, with a full width at half maximum (FWHM) of 17.5 nm, which matches well with the commercial laser diode pumping sources. The strongest emission peak of 5.0% Er∶CNGG crystal is located at 2 709 nm with FWHM of 17.3 nm. The lifetime of 4I13/2 energy level of 0.3%, 2.0%, 3.0% and 5.0% Er∶CNGG crystals are 5.97, 6.30, 6.46 and 5.73 ms, respectively. The results show that Er∶CNGG crystal is a potential gain medium for laser at around 2.7 μm.

Key words: Er∶CNGG; micro-pulling-down method; crystal growth; spectral property; 2.7 μm; gain medium for laser

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