Er3+掺杂CaYAlO4晶体光谱和激光性能研究

人工晶体学报 ›› 2024, Vol. 53 ›› Issue (11): 1868-1876.

• 激光晶体/ 透明陶瓷 • 上一篇下一篇

Er³⁺掺杂CaYAlO₄晶体光谱和激光性能研究

张志恒¹, 侯文涛², 刘坚¹, 李东振³, 薛艳艳⁴, 王庆国³, 吕莎莎¹, 徐晓东¹, 徐军³

1.江苏师范大学物理与电子工程学院,徐州 221116;
2.中北大学半导体与物理学院,太原 030051;
3.同济大学物理科学与工程学院,上海 200092;
4.中国科学院上海硅酸盐研究所,上海 201800

收稿日期:2024-09-02 出版日期:2024-11-15 发布日期:2024-12-09
通信作者: 吕莎莎,博士,讲师。E-mail:lvshasha@jsnu.edu.cn;徐晓东,博士,教授。E-mail:xdxu79@jsnu.edu.cn
作者简介:张志恒(1995—),男,江苏省人,硕士研究生。 E-mail:1635734725@qq.com
基金资助:
国家重点研发计划(2023YFB3507404);国家自然科学基金(52032009)

Spectral and Laser Properties of Er³⁺-Doped CaYAlO₄ Crystals

ZHANG Zhiheng¹, HOU Wentao², LIU Jian¹, LI Dongzhen³, XUE Yanyan⁴, WANG Qingguo³, LYU Shasha¹, XU Xiaodong¹, XU Jun³

1. School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China;
2. School of Semiconductor and Physics, North University of China, Taiyuan 030051, China;
3. School of Physical Science and Engineering, Tongji University, Shanghai 200092, China;
4. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China

Received:2024-09-02 Online:2024-11-15 Published:2024-12-09

摘要/Abstract

摘要： 采用提拉法成功生长出掺杂浓度(原子数分数)为15%和30%的Er∶CaYAlO₄晶体。研究了Er∶CaYAlO₄晶体偏振光谱性能和激光特性。测试了室温下晶体的偏振吸收光谱、偏振荧光光谱和荧光衰减曲线。CaYAlO₄基质的无序性使吸收谱和发射谱呈现宽带特征。15%Er∶CaYAlO₄晶体在σ偏振和π偏振的发射截面分别为1.22×10^-20 cm²(2 712 nm)和0.71×10^-20 cm² (2 754 nm),半峰全宽(FWHM)分别为152和167 nm。随着Er³⁺掺杂浓度升高,⁴I_11/2和⁴I_13/2能级的荧光寿命均有不同程度的下降,而且上下能级寿命比值(τ_lower/τ_upper)大幅减小。能量传递上转换过程ETU1不仅可以抑制自终止效应还可以提高2.7 μm辐射跃迁量子效率。974 nm LD泵浦源的激发下,透过率1.5%的输出镜对应的激光性能最佳。c切15%Er∶CaYAlO₄晶体在2 720 nm处最大输出功率为358 mW,斜效率为15.4%。

关键词: Er∶CaYAlO₄, 提拉法, 光谱性能, 激光性能, 激光晶体

Abstract: Er³⁺-doped CaYAlO₄ crystals with the doping concentration (atomic fraction) of 15% and 30% were successfully grown by Czochralski method. The polarized spectral and laser properties of Er∶CaYAlO₄ crystals were studied. The polarized absorption spectra, polarized emission spectra and fluorescence decay curves were measured at room temperature. The disorder of CaYAlO₄ crystal results in broadband characteristics of absorption and emission spectra. The emission cross section of 15% Er∶CaYAlO₄ is determined to be 1.22×10^-20 cm² at 2 712 nm for σ polarization and 0.71×10^-20 cm² at 2 754 nm for π polarization, with a full width at half maximum (FWHM) of 152 and 167 nm, respectively. As Er³⁺ concentration increases, fluorescence lifetime of ⁴I_11/2 and ⁴I_13/2 energy levels decreases in different degrees, and lifetime ratio (τ_lower/τ_upper) greatly reduces. The energy transfer upconversion ETU1 not only suppresses self-termination effect but also improves quantum efficiency of 2.7 μm radiative transition. Under 974 nm LD excitation, laser property for output couple mirror with a transmittance of 1.5% is best. The maximum output power is 358 mW at 2 720 nm with a slope efficiency of 15.4% in c-cut 15%Er∶CaYAlO₄ crystal.

Key words: Er:CaYAlO₄, Czochralski method, spectral property, laser property, laser crystal

中图分类号:

O734

张志恒, 侯文涛, 刘坚, 李东振, 薛艳艳, 王庆国, 吕莎莎, 徐晓东, 徐军. Er³⁺掺杂CaYAlO₄晶体光谱和激光性能研究[J]. 人工晶体学报, 2024, 53(11): 1868-1876.

ZHANG Zhiheng, HOU Wentao, LIU Jian, LI Dongzhen, XUE Yanyan, WANG Qingguo, LYU Shasha, XU Xiaodong, XU Jun. Spectral and Laser Properties of Er³⁺-Doped CaYAlO₄ Crystals[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(11): 1868-1876.

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Er³⁺掺杂CaYAlO₄晶体光谱和激光性能研究

Spectral and Laser Properties of Er³⁺-Doped CaYAlO₄ Crystals

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