J* E* C* N* U* N* S* ›› 2025, Vol. 2025 ›› Issue (3): 33-42.doi: 10.3969/j.issn.1000-5641.2025.03.005

• Physics and Electronics • Previous Articles     Next Articles

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

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

CLC Number: