钨酸钇钠晶体中Tm^(3+)的光谱特性  

Spectroscopic properties of Tm^(3+)-doped NaY(WO_(4))_(2) crystals~*

作　　者：宋峰[1] 苏静[1] 谭浩[1] 商美茹[1] 吴朝晖[1] 田建国[1] 张光寅[1] 程振祥[2] 陈焕矗[2] 

机构地区：[1]南开大学光子学中心,天津300071 [2]山东大学晶体研究所,济南250100

出　　处：《物理学报》2004年第10期3591-3595,共5页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :60 3 770 3 3 ;60 0 2 5 5 12 );教育部重点基金 (批准号 :0 10 47)资助的课题~~

摘　　要：测量了Tm3+ :NaY(WO4 ) 2 晶体的吸收光谱、发射光谱和激发光谱 ,利用J_O理论计算了钨酸钇钠晶体的强度参数 :Ω2 =7 2 130 4× 10 - 2 0 cm2 ,Ω4 =0 5 0 4 76 6× 10 - 2 0 cm2 ,Ω6 =0 977784× 10 - 2 0 cm2 ,以及Tm3+ 的光学参数包括各能级的荧光寿命和荧光分支比、积分发射截面等 ,在计算了Tm3+ 的自发辐射概率时 ,同时考虑了电偶极跃迁和磁偶极跃迁 .研究了其发光特性和跃迁通道 ,发现存在1 D2 +3H6 →1 G4 +3F4Absorption spectra, emission spectra and excitation spectra of Tm^(3+)_doped NaY(WO_(4))_(2) crystals have been measured at room temperature. Such parameters as the intensity parameter, oscillation strength, rate of spontaneous emissions, lifetime and integrated emission cross section have been calculated according to Judd_Ofelt theory and absorption spectra. The intensity parameters are Ω_(2)=8.67319×10^(-20)cm^(2),Ω_(4)=1.70424×10^(-20) cm^(2),Ω_(6)=1.55845×10^(-20) cm^(2 ). When calculating the spontaneous emission lifetimes, we take into account the magnetic dipole transitions. From the measured spectra, the mechanism of transitions has been analyzed in detail and the cross relaxation ()^(1)D_(2)+()^(3)H_(6)→^(1)G_(4)+()^(3)F_(4) were put forward and verified.

关 键 词：钨酸钇钠晶体 TM^3+ 磁偶极 偶极跃迁 能级 积分 分支比 自发辐射 光谱特性 发光特性 

分 类 号：O433[机械工程—光学工程]