Er:YCa_4O(BO_3)_3光谱参数的计算及分析  

Optical Parameters of Er:YCa_4O(BO_3)_3 Crystal

作　　者：赵朋[1] 夏海瑞[1] 孟宪林[2] 程秀风[2] 祝莉[2] 杨兆荷[2] 

机构地区：[1]山东大学物理与微电子学院 [2]山东大学物理系和晶体材料国家重点实验室,山东济南250100

出　　处：《光谱学与光谱分析》2003年第4期637-640,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (No 1 0 2 740 4 3) ;山东省自然科学基金 (Y2 0 0 1A0 6);攻关项目 (0 1 2 1 2 0 1 0 5) ;山东大学晶体材料国家重点实验室资助

摘　　要：测定了Er:YCa4O(BO3 ) 3 晶体室温下的吸收谱。根据Judd Ofelt理论拟合了Er3 + 离子的晶体场调节参数Ωt=(2 ,4 ,6 ) 分别为 19 2 0 4 9× 10 -2 2 ,5 992 0× 10 -2 2 和 4 3334× 10 -2 2 cm2 ,计算了各能级跃迁的谱线强度、自发辐射跃迁几率、辐射寿命、荧光分支比和积分发射横截面 ,并对结果作了分析。最后讨论了Yb3 + 的敏化作用。The room temperature absorption spectra of Er: YCa4O(BO3)(3) (Er:YCOB)were measured. The optical parameters of Er: YCOB crystal were calculated by following J-O theory. The three optical parameters Omega(t) (t = 2, 4, 6) were found to be 19.204 9 x 10(-22), 5.992 0 x 10(-22), and 4.333 4 x 10(-22) cm(2), respectively. Some interesting transitions were calculated and the result was discussed The radiation from H-2(9/2) --> I-4(13/2) and S-4(3/2) --> I-4(15/2) transitions with green ray of 554 nm, and that from H-2(9/2) --> I-4(15/2) transitions with violet ray of 408 nm in the crystal are likely to provide some practical application as a laser material due to the large branching ratio, line intensity of the emission band, and integrated emission cross-section. The large level lifetime and the absorption wavelength of I-4(11/2) and I-4(13/2) also attract much attention. Finally, we discussed the sensitizing effect of Yb3+.

关 键 词：Er:YCa4O(BO3)3 光谱参数 计算 光谱参数 晶体光谱 硼酸钙氧钇 

分 类 号：O734[理学—晶体学] TN244[电子电信—物理电子学]