Growth of Cr,Yb:YAG single crystals for self-Q-switched monolithic solid-state lasers

被引：6

作者：

Ma, Benyuan ^{[1
,2
]}

Zhang, Wei ^{[2
]}

Luo, Hui ^{[2
]}

Yuan, Fei ^{[2
]}

Cheng, Beitong ^{[2
]}

Bai, Liuyang ^{[1
]}

Tang, Yong ^{[1
]}

Song, Hai-zhi ^{[2
,3
]}

机构：

[1] Huanghuai Univ, Coll Energy Engn, Zhumadian 463000, Peoples R China

[2] Southwest Inst Tech Phys, Chengdu 610041, Peoples R China

[3] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Sect 2-4,Jianshebei Rd, Chengdu 610054, Sichuan, Peoples R China

来源：

OPTICAL MATERIALS | 2023年 / 143卷

关键词：

Self-Q-laser crystal; Cr; Yb; YAG; Charge compensator; Absorber; Laser damage threshold; EMISSION CROSS-SECTION; CONVERSION EFFICIENCY; FLUORESCENCE LIFETIME; CR4+ IONS; YAG; CERAMICS; ADDITIVES; PERFORMANCE; FABRICATION; CRYAG;

D O I：

10.1016/j.optmat.2023.114218

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The saturable absorbers play key role in passively Q-switched lasers, and Cr4+-doped crystals present attractive advantages for Yb:YAG lasers. At present the major problem is the low doping concentration of Cr4+ and the effective way to promote Cr3+& RARR;Cr4+ conversion. From this view, we introduce divalent additives Ca2+ and Mg2+ as charge compensators to ensure the charge state of Cr4+ in the tervalence environment of Yb:YAG. The results reveal that this method can promote Cr3+& RARR;Cr4+ conversion effectively and an optimal CaO/MgO ratio is 1:4. The corresponding Cr0.01at.%,Yb5at.%:YAG single crystals present enhanced absorption coefficients and fluorescence intensity at 941 nm and 1030 nm, and decreased fluorescence lifetimes and decay curves than Yb:YAG. The thermal expansion coefficient and laser damage threshold of Cr,Yb:YAG single crystal are approaching the YAG host material. The results show that Cr,Yb:YAG crystal has good potential for self-Q-switched monolithic solidstate lasers.

引用

页数：8

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