掺Tm钒酸钇的光学性能  

OPTICAL PROPERTY OF Tm:YVO_4 CRYSTAL

作　　者：陈晓波[1] 何琛娟[1] 陈鸾[1] 庄建[2] 宋增福[3] 

机构地区：[1]北京师范大学光学中心 [2]中国科学院福建物质结构研究所,福州350001 [3]北京大学物理系,北京100875

出　　处：《物理学报》2001年第7期1371-1377,共7页Acta Physica Sinica

基　　金：国家自然科学基金! (批准号 :198740 3 3 );国家重点基础研究发展规划资助! (批准号 :G19980 613 11)&&

摘　　要：钒酸钇 (YVO4)晶体有高的激光损伤阈值和高的激光输出斜率效率 ,也有很好的机械性能和化学稳定性 .从测量Tm :YVO4晶体的吸收谱入手 ,考虑该晶体的各向异性效应 ,拟合出Tm3+ 的光学强度参量 ,进一步得到了振子强度f,辐射跃迁速率A和积分发射截面Σ等光学参量 .在 35 0— 2 5 0 0nm范围内 ,YVO4晶体基质的吸收很小 ,而Tm3+在YVO4晶体中发光能力很强 ;特有的是蓝光1 D2 →3F4(约为 45 4nm)跃迁有极大的振子强度 (38× 10 - 6 )和积分发射截面 (33× 10 - 1 8cm) ,有利于实现短波长的激光输出 .YVO4 crystal has high laser output slope efficiency and damage threshold,good mechanical property and chemical stability. V(Ie have measured the absorption of Tm: YVO4 crystal. The anisotropy effect is taken account. The optical intensity parameters are fitted out. And the oscillator strength f, the radiative transition rate,the integral emission section B are calculated. In the wavelength range of 350-2500 nm,the absorption of YVO4 crystal itself is rather small. However, Tm3+ ions in the YVO4 crystal have very strong luminescent ability. Especially,the D-1(2) --> F-4 (about 454nm) blue transition has excellent oscillator strength (f = 38 x 10(-6)) and integral emission section (Sigma = 33 x 10(-18) cm). It is quite benefit to achieve laser lasing in short-wavelength. In brief,the rare earth ion doped YVO4 crystal is a kind of wonderful laser material,which has great applications in future.

关 键 词：YVO4晶体 Tm^3+离子 光学参量计算 光学性能 Tm:YVO4晶体 吸收谱 

分 类 号：O734[理学—晶体学]