Sm:YAG晶体生长与吸收光谱研究  

Study on Growth and Absorption Spectra of Sm:YAG Crystal

作　　者：李洪峰 韩剑锋 杨国利 莫小刚 

机构地区：[1]北京雷生强式科技有限责任公司,北京100015

出　　处：《人工晶体学报》2013年第7期1305-1308,共4页Journal of Synthetic Crystals

摘　　要：采用提拉法生长了掺杂3.0at%,5.0at%和10.0at%浓度的Sm∶YAG晶体。采用ICP-AES方法初步测试了Sm离子在晶体中的浓度,并根据测试结果计算了Sm离子在晶体中的分凝系数,探讨了生长高掺杂浓度晶体的生长条件,测试了其在可见光及近红外光波段的吸收光谱。结果表明,Sm∶YAG晶体在80～900 nm处几乎完全透明,在Nd∶YAG晶体的发射波段,可有效吸收1064 nm的近红外光,且随着掺杂浓度的增加,其吸收效果越强。这表明Sm∶YAG晶体对于高功率Nd∶YAG激光器工作过程中产生的放大自发辐射现象引起的寄生振荡具有较好的抑制作用。The Sm： YAG crystals with dopant concentration 3.0at%, 5.0at% and 10.0at% were grown by Cz method. The concentration of Sm ions in crystal was test with ICP-AES method, and the segregation coefficient was calculated with the result of Sm ions concentration. The growth condition for growing high dopant concentration was discussed, and the absorption spectra of crystals between visible light and near infrared were investigated. This absorption spectra show that the crystal has very weak absorption in the 800-900 nm range and has stronger absorption in the emitting wavelength crystal. The absorption coefficient is increased as the dopant concentration increasing. This that Sm： YAG can be used for suppression of parasitic oscillations caused by the amplified emission occurred during the working of high power Nd： YAG lasers. of Nd： YAG study shows spontaneous

关 键 词：Sm∶YAG晶体 掺杂浓度 分凝系数 放大自发辐射 

分 类 号：O773[理学—晶体学]