Growth and Luminescence Properties of Pr3+ Doped Alkaline Earth Mixed Fluoride Laser Crystals

Abstract

Abstract: In this paper, 0.6%Pr∶Ca_xSr_1-xF₂ (x=0, 0.3, 0.5, 0.7, 1.0) and 0.6%Pr, 5%R∶Ca_0.5Sr_0.5F₂ (R=Y, Lu, Gd) crystals were grown by porous crucible temperature gradient technology. The crystal structure, absorption spectra, fluorescence spectra and fluorescence lifetime were systematically analyzed and discussed. Through the analysis of spectral parameters such as absorption cross section, emission cross section, fluorescence lifetime and fluorescence full width at half maximum (FWHM), it is concluded that 0.6%Pr,5%Y∶Ca_0.5Sr_0.5F₂ mixed crystals have the best spectral parameter compared with other doped mixed crystals. The corresponding absorption cross sections at 443 nm and red emission cross sections at 640 nm are 1.63×10^-20 and 3.39×10^-20 cm², respectively. The FWHM and fluorescence lifetime are fitted to be 4.50 nm and 42.8 μs, respectively. The spectral parameters have been greatly improved compared with 0.6%Pr∶Ca_xSr_1-xF₂ (x=0, 0.3, 0.5, 0.7, 1.0) mixed crystals. All results show that 0.6%Pr,5%Y∶Ca_0.5Sr_0.5F₂ crystals have great potential as gain media for novel Pr³⁺ doped broadband laser material.

Key words: laser crystal, alkaline earth fluoride, Pr³⁺ doping, visible laser, luminescence property

CLC Number:

O78
O734

WANG Wudi, WANG Qingguo, XUE Yanyan, TANG Huili, XU Zihan, ZHANG Chenbo, FANG Qiancheng, WU Feng, LUO Ping, XU Xiaodong, SU Liangbi, LI Yan, HAN Jianfeng, LU Zhanwen, XU Jun. Growth and Luminescence Properties of Pr³⁺ Doped Alkaline Earth Mixed Fluoride Laser Crystals[J]. Journal of Synthetic Crystals, 2023, 52(7): 1258-1269.

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Growth and Luminescence Properties of Pr³⁺ Doped Alkaline Earth Mixed Fluoride Laser Crystals

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