华东师范大学学报(自然科学版) ›› 2025, Vol. 2025 ›› Issue (3): 33-42.doi: 10.3969/j.issn.1000-5641.2025.03.005

• 物理学与电子学 • 上一篇    下一篇

掺杂Yb3+的LiYF4和Y3Al5O12 反斯托克斯荧光冷却对比研究

雷永清1,2(), 胡晋伟1, 王朝玉2, 钟标2,*(), 印建平2,*()   

  1. 1. 山西工程科技职业大学 基础课教学部, 山西 晋中 030619
    2. 华东师范大学 精密光谱科学与技术国家重点实验室, 上海 200241
  • 收稿日期:2024-09-06 出版日期:2025-05-25 发布日期:2025-05-28
  • 通讯作者: 钟标,印建平 E-mail:leiyongqing@sxgkd.edu.cn;bzhong@lps.ecnu.edu.cn;jpyin@phy.ecnu.edu.cn
  • 作者简介:雷永清, 男, 博士研究生, 研究方向为固体材料激光冷却. E-mail: leiyongqing@sxgkd.edu.cn
  • 基金资助:
    国家自然科学基金(11604100, 11834003, 61574056, 91536218, 11874151); 中国博士后自然科学基金特别资助项目(2016T90346); 山西省高等学校科技创新计划项目 (2023L419, 2024L425); 山西工程科技职业大学科研项目(KJ202324)

Comparison of Yb3+-doped LiYF4 and Y3Al5O12 in anti-Stokes fluorescence cooling

Yongqing LEI1,2(), Jinwei HU1, Chaoyu WANG2, Biao ZHONG2,*(), Jianping YIN2,*()   

  1. 1. Basic Course Teaching Department, Shanxi Vocational University of Engineering and Technology, Jinzhong , Shanxi 030619, China
    2. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
  • Received:2024-09-06 Online:2025-05-25 Published:2025-05-28
  • Contact: Biao ZHONG, Jianping YIN E-mail:leiyongqing@sxgkd.edu.cn;bzhong@lps.ecnu.edu.cn;jpyin@phy.ecnu.edu.cn

摘要:

激光诱导固体反斯托克斯荧光冷却在全固态低温光学制冷器和辐射平衡激光器领域有着重要的应用价值, 而掺杂Yb3+的LiYF4 (YLF)晶体和Y3Al5O12 (YAG)晶体以其卓越的激光冷却性能脱颖而出. 在相同的条件下, 对Yb3+掺杂浓度为7.5%的YLF晶体和YAG晶体的光谱特性和反斯托克斯荧光冷却性能进行了比较分析. 研究结果表明, 与7.5%Yb3+:YAG晶体相比, 7.5%Yb3+:YLF晶体具有更小的最低可达到温度, 成为低温制冷器更可行的候选者. 此外, 在1030 nm激光泵浦条件下, 未能在7.5%Yb3+:YAG晶体中观测到净制冷效应. 因此, 对于设计采用Yb3+:YAG晶体作为增益介质的辐射平衡激光器而言, Yb3+的掺杂浓度不应超过7.5%.

关键词: 反斯托克斯荧光冷却, Yb3+:LiYF4(YLF)晶体, Yb3+:Y3Al5O12(YAG)晶体

Abstract:

Laser-induced solid-state anti-Stokes fluorescence cooling has important application value in the fields of all-solid-state cryogenic optical coolers and radiation balance lasers. Among many fluorides and oxide crystal materials, Yb3+-doped LiYF4 (YLF) and Y3Al5O12 (YAG) crystals stand out for their excellent laser cooling performance. Accordingly, in this study, the spectral properties and anti-Stokes fluorescence cooling properties of Yb3+ and YAG crystals with 7.5% doping concentration were compared and analyzed in detail under the same conditions. The results show that compared with YAG crystal, YLF crystal has a smaller minimum achievable temperature, and hence, a more feasible candidate for use in cryogenic coolers. In addition, under the condition of 1030 nm laser pumping, the net cooling effect cannot be observed in 7.5% Yb3+:YAG crystal. Therefore, for the radiation balance laser designed with Yb3+:YAG crystal as the gain medium, the doping concentration of Yb3+ should not exceed 7.5%.

Key words: anti-Stokes fluorescence cooling, Yb3+-doped LiYF4(YLF) crystal, Yb3+-doped Y3Al5O12(YAG) crystal

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