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无机材料学报

无机材料学报 ›› 2026, Vol. 41 ›› Issue (10): 1442-1452.DOI: 10.15541/jim20260023

• 研究论文 • 上一篇    下一篇

Tb:LiYF4单晶生长及光谱性能研究

余学舟1(), 刘国晋1,2, 黄昌保1(), 李亚1,2, 陈伟豪1,2, 祁华贝1,2, 倪友保1, 吴海信1   

  1. 1 中国科学院 合肥物质科学研究院, 安徽光学精密机械研究所, 安徽省光子器件与材料重点实验室, 合肥 230031
    2 中国科学技术大学, 合肥 230026
  • 收稿日期:2026-01-14 修回日期:2026-02-15 出版日期:2026-10-20 网络出版日期:2026-04-20
  • 通讯作者: 黄昌保, 副研究员. E-mail: cbhuang@aiofm.ac.cn
  • 作者简介:余学舟(1996-), 男, 博士研究生. E-mail: xzyu@aiofm.ac.cn

Crystal Growth and Spectroscopic Properties of Tb:LiYF4 Single Crystals

YU Xuezhou1(), LIU Guojin1,2, HUANG Changbao1(), LI Ya1,2, CHEN Weihao1,2, QI Huabei1,2, NI Youbao1, WU Haixin1   

  1. 1 Anhui Provincial Key Laboratory of Photonic Devices and Material, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
    2 University of Science and Technology of China, Hefei 230026, China
  • Received:2026-01-14 Revised:2026-02-15 Published:2026-10-20 Online:2026-04-20
  • Contact: HUANG Changbao, associate professor. E-mail: cbhuang@aiofm.ac.cn
  • About author:YU Xuezhou (1996-), male, PhD candidate. E-mail: xzyu@aiofm.ac.cn

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摘要：

LiYF4晶体是一种具有优异光学和物理性能的激光基质材料, Tb3+掺杂使其在绿、黄光波段高能量脉冲激光领域具有重要应用潜力。然而氟化物原料易潮解、高温下组分易挥发以及强腐蚀性等问题, 对高品质晶体制备及生长成本控制带来了挑战。本研究采用真空密封铂金坩埚工艺结合垂直布里奇曼法成功生长了尺寸为φ16 mm× 120 mm的Tb:LiYF4单晶。通过多种测试手段对晶体的结晶质量、组分均匀性及光学性能进行了系统表征。晶体在透明波段内透过率超过93%, 吸收系数低于0.02 cm-1, 具有优异的光学质量。基于Judd-Ofelt理论, 计算得到三个振子强度参数以及一系列光谱参数, 并测试了变温条件下荧光发射光谱以及荧光衰减曲线。Tb:LiYF4在545和585 nm处表现出强荧光发射, 荧光分支比分别为57%和15%, 常温下5D4能级荧光寿命为4.83 ms, 较大的荧光分支比以及较长的荧光寿命表明Tb:LiYF4晶体具有在绿光与黄光波段实现高效率激光输出的潜力。本研究成功建立了一种可行的Tb:LiYF4晶体生长方法, 并对其光谱性能进行了系统性研究, 为构建高效率绿、黄光固体激光器提供了材料基础与实验依据。

关键词: 布里奇曼法, 坩埚密封, Tb:LiYF4晶体, Judd-Ofelt理论, 光谱性能

Abstract:

LiYF4 crystal is a laser host material with excellent optical and physical properties, and Tb3+ doping endows it with great potential for high-energy pulsed laser operation in the green and yellow spectral regions. However, the hygroscopicity of fluoride raw materials, the volatility of components at high temperatures, and the strong corrosiveness pose challenges to the growth of high-quality crystals and cost control. In this work, a Tb:LiYF4 single crystal with dimensions of φ16 mm×120 mm was successfully grown using a vacuum-sealed platinum crucible combined with the vertical Bridgman method. The crystalline quality, compositional uniformity, and optical properties were systematically characterized using multiple techniques. The crystal exhibits a transmittance exceeding 93% and an absorption coefficient below 0.02 cm-1 in the transparent region, indicating excellent optical quality. Based on Judd-Ofelt theory, three intensity parameters and related spectroscopic parameters were obtained, and temperature dependent fluorescence emission spectra and fluorescence decay curves were measured. Strong emissions were observed at 545 and 585 nm, with fluorescence branching ratios of 57% and 15%, respectively. The fluorescence lifetime of the 5D4 level at room temperature is 4.83 ms. The relatively large branching ratios and the long fluorescence lifetime indicate that Tb:LiYF4 crystal has great potential for achieving efficient laser output in the green and yellow spectral regions. This work establishes a feasible growth method for Tb:LiYF4 crystals and provides a systematic investigation of their spectroscopic properties, providing a material basis and experimental support for the development of high-efficiency green and yellow solid-state lasers.

Key words: Bridgman method, sealed crucible, Tb:LiYF4 crystal, Judd-Ofelt theory, spectroscopic property

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