基于Yb3+:LuLiF4晶体的低温光学制冷器的热链接设计与分析

doi:10.3969/j.issn.1000-5641.2025.03.009

华东师范大学学报（自然科学版） ›› 2025, Vol. 2025 ›› Issue (3): 72-79.doi: 10.3969/j.issn.1000-5641.2025.03.009

基于Yb³⁺:LuLiF₄晶体的低温光学制冷器的热链接设计与分析

张子恒¹, 钟标¹^,*(), 王朝玉¹, 徐家金¹, 张佳宜¹, 潘宸乐², 印建平¹^,*()

1. 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
2. CWA世华学校, 江苏常熟　215500

收稿日期:2024-03-29 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:bzhong@lps.ecnu.edu.cn;jpyin@phy.ecnu.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)

Design and analysis of thermal link for cryogenic optical cooler based on Yb³⁺:LuLiF₄ crystal

Ziheng ZHANG¹, Biao ZHONG¹^,*(), Chaoyu WANG¹, Jiajin XU¹, Jiayi ZHANG¹, Chenle PAN², Jianping YIN¹^,*()

1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai　200241, China
2. CWA School, Changshu, Jiangsu 215500, China

Received:2024-03-29 Online:2025-05-25 Published:2025-05-28
Contact: Biao ZHONG, Jianping YIN E-mail:bzhong@lps.ecnu.edu.cn;jpyin@phy.ecnu.edu.cn

摘要/Abstract

摘要：

低温光学制冷器是利用固体材料反斯托克斯荧光过程产生冷量的新型低温制冷器, 具有结构紧凑、温区宽、无振动等特点, 在空间技术、精密计量等领域具有重要的应用前景. 介绍了基于Yb³⁺:LuLiF₄激光冷却晶体的低温光学制冷器原理样机的结构, 并对制冷器中热链接结构的荧光逃逸系数和热负载进行了分析计算; 设计了不同热链接结构, 并利用光学仿真软件模拟了荧光在热链接中的传输过程, 根据光线追迹结果得到了不同结构热链接的荧光逃逸系数; 分析了不同弯折结构热链接的热负载, 并计算了低温平衡时D型弯折结构热链接的热负载; 综合考虑热链接的荧光逃逸系数与热负载, 筛选出了最合适的热链接结构应用于低温光学制冷器. 该热链接方案对搭建低温光学制冷器以及提高低温光学制冷器制冷功率具有指导意义.

关键词: 固体材料激光冷却, 低温光学制冷器, 热负载, 荧光分析

Abstract:

As a novel cryocooler, a cryogenic optical refrigerator utilizing an anti-Stokes fluorescence process provides cooling power to a payload. Cryogenic optical refrigerators exhibit a compact structure, wide temperature range, and non-vibration. Hence, they are promising for applications in space technology, defense, and precision measurement. In this study, the principle prototype of a cryogenic optical refrigerator is introduced based on a cooling-grade Yb³⁺:LuLiF₄ crystal. Furthermore, the fluorescence escape coefficient and thermal loads of a heat link in an optical refrigerator is analyzed. Various heat link structures are designed, the fluorescence transmission process in these heat links is simulated using an optical simulation software, and the fluorescence escape coefficients of the different structures are determined based on the ray tracing results. The thermal loads of the heat link in the optical refrigerator are analyzed, and the thermal loads of the refrigerator with different angles of D-type bending structure heat links at low temperatures are calculated. The most suitable heat-link structure for cryogenic optical refrigerators is identified by optimizing the fluorescence escape coefficient and thermal loads of the heat link. The heat link design proposed in this study provides a good solution for high-efficiency cryogenic optical coolers.

Key words: laser cooling of solid materials, cryogenic optical coolers, thermal load, fluorescence analysis

中图分类号:

O433.2

张子恒, 钟标, 王朝玉, 徐家金, 张佳宜, 潘宸乐, 印建平. 基于Yb³⁺:LuLiF₄晶体的低温光学制冷器的热链接设计与分析[J]. 华东师范大学学报（自然科学版）, 2025, 2025(3): 72-79.

Ziheng ZHANG, Biao ZHONG, Chaoyu WANG, Jiajin XU, Jiayi ZHANG, Chenle PAN, Jianping YIN. Design and analysis of thermal link for cryogenic optical cooler based on Yb³⁺:LuLiF₄ crystal[J]. J* E* C* N* U* N* S*, 2025, 2025(3): 72-79.

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候选材料	Transmission range /μm	κ(@ 300 K)/(W·mK^–1)	CTE/(10^–6 K^–1)
候选材料	Transmission range /μm	κ(@ 300 K)/(W·mK^–1)	E//c	E⊥c
Sapphire	0.17 ~ 5.50	~ 40	5.90	6.95
LuLiF₄	0.13 ~ 7.00	~ 6	10.80	14.60
MgF₂	0.12 ~ 7.00	~ 30	13.70	8.90

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基于Yb³⁺:LuLiF₄晶体的低温光学制冷器的热链接设计与分析

Design and analysis of thermal link for cryogenic optical cooler based on Yb³⁺:LuLiF₄ crystal

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