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Growth, Optical, and Laser Properties of Large-Sized Cr,Nd:Y3Al5O12 Crystal
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2021-09-13 , DOI: 10.1002/crat.202100020
Wen Li 1, 2, 3 , Yan Wang 1, 2 , Yingshu Lian 1, 2, 4 , Jianfu Li 1, 2 , Zhenyu You 1, 2 , Zhaojie Zhu 1, 2 , Chaoyang Tu 1, 2 , Yadong Xu 5 , Wanqi Jie 5 , Yaqi Cai 6 , Bin Xu 6
Affiliation  

The growth and characterization of Cr,Nd:Y3Al5O12 (YAG) crystal are reported. By improving the synthesis and sintering processes of polycrystalline materials, as well as the temperature gradient and annealing atmosphere, a high quality crystal with size of ϕ30 mm × 110 mm is obtained by using the Czochralski technique. After measuring the concentrations of dopant Cr3+ and Nd3+ within the different parts of the grown crystal, it is found that the distribution of dopant ions is uniform throughout the crystal. The fluorescence spectra of Cr,Nd:YAG crystal exhibit intense emissions at 1064 nm under excitations of 808 and 450 nm. The fluorescence lifetime of Nd: 4F3/2 level is obtained to be 234.2 µs. The maximum average output power reaches 7.87 W with a slope efficiency of 31.2% for near-infrared laser at 1063.9 nm. The above results indicate that Cr,Nd:YAG crystal is a promising gain media for all-solid state lasers.

中文翻译:

大尺寸 Cr,Nd:Y3Al5O12 晶体的生长、光学和激光特性

报道了 Cr,Nd:Y 3 Al 5 O 12 (YAG) 晶体的生长和表征。通过改进多晶材料的合成和烧结工艺,以及温度梯度和退火气氛,采用直拉技术获得了尺寸为φ30 mm × 110 mm的高质量晶体。在测量生长晶体不同部分的掺杂剂Cr 3+和Nd 3+的浓度后,发现掺杂剂离子在整个晶体中的分布是均匀的。Cr,Nd:YAG 晶体的荧光光谱在 808 和 450 nm 激发下在 1064 nm 处表现出强烈的发射。Nd的荧光寿命:4 F 3/2获得的电平为 234.2 µs。对于 1063.9 nm 的近红外激光,最大平均输出功率达到 7.87 W,斜率效率为 31.2%。上述结果表明 Cr,Nd:YAG 晶体是一种很有前途的全固态激光器增益介质。
更新日期:2021-10-09
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