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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (11): 1966-1969. 上一篇    下一篇

研究论文

Nd:GdVO4晶体的生长与光谱性能

江怀东;王继杨;李静;张怀金;胡小波;刘均海;夏海瑞   

  1. 山东大学晶体材料国家重点实验室
  • 发布日期:2001-11-15

Growth and spectroscopic properties of Nd: GdVO4 crystal

Jiang Huaidong;Wang Jiyang;Li Jing;Zhang Huaijin;Hu Xiaobo;Liu Junhai;Xia Hairui   

  • Published:2001-11-15

PDF

414

被引次数

6

采用Czochralski法生长了均匀透明的Nd:GdVO4晶体，测量了其室温偏振吸收谱，并与0.2mol·L^-1的NdCl3溶液的室温吸收谱进行了比较。根据Judd-Ofelt理论，拟合出晶体场唯象强度参数：Ω2=12.629×10^-20cm^2,Ω4=4.828×10^-20cm^2,Ω6=8.425×10^-20cm^2.计算了各能级的辐射跃迁几率AJ,J',振子强度PJ,J;,辐射寿命τ，荧光分支比βJ'等光学参量。并用LD激光器泵浦Nd:GVO4晶体，当量大泵浦功率为26W时，得到输出功率为14.3W波长为1.06μm的基频光，光-光转换效率为55%，斜效率为63%。

关键词: 钕, 钒酸镉, 晶体生长, 光谱参数, 激光晶体

Transparent and homogeneous Nd:GdVO4 crystal have been obtained by the Czochralski method. The room temperature absorption spectra has been measured and compared with that of 0.2mol·L^-1 NdCl3 solution. The spectral strength parameters: Ω2=12.629×10^ -20cm^2, Ω4=4.828× 10^-20cm^2, Ω6=8.425×10^-20cm^2 of Nd^3 ion were fitted according to the Judd-Ofelt theory. The radiative transition probabilities AJ, J', oscillator strengths PJ, J', radiative lifetime τ and the branching ratio βJ' were also calculated. A highest output power of up to 14.3 W at 1.06μm was observed with a 4 mm thick Nd: GdVO4 crystal sample when pumped by a 26W cw laser diode array. The light-light conversion efficiency was 55%, with an average slope efficiency of 63%.

Key words: NEODYMIUM, CRYSTAL GROWTH, LASER CRYSTAL

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