一种独立于激发光脉冲参量的磷光寿命测量方法  

Phosphorescence Lifetime Measurement Independent on the Parameters of the Excitation Light Pulse

作　　者：李成军[1] 曾绍群[1] 骆清铭[1] 陈同生[1] 龚辉[1] 

机构地区：[1]华中科技大学生物医学光子学教育部重点实验室,武汉430074

出　　处：《光学学报》2002年第9期1141-1144,共4页Acta Optica Sinica

基　　金：国家杰出青年科学基金 (6 0 0 2 5 5 14);国家自然科学基金(5 9836 2 40;39870 2 0 5;30 0 70 2 15 );高校博士点专项基金(980 48733)资助课题

摘　　要：脉冲法磷光寿命测量中 ,激发光脉冲参量 (脉冲宽度和形状 )、用于磷光强度衰减分析的起始时刻的选取是影响寿命计算准确度的关键因素。以线性时不变系统理论为依据 ,探讨了磷光强度衰减特性与激发光脉冲参量之间的关系 ,发现对于有限宽度的激发光 ,激发光脉冲消失之后的磷光强度衰减特性独立于激发光脉冲参量 ;选取激发光脉冲消失时刻作为磷光强度衰减分析的起始时刻 ,可获得准确的寿命计算。利用磷光探针氧卟啉 (Oxy PhorR2 )标准试样做了针对性实验 。In the phosphorescence lifetime measurements with pulse method, both the excitation light pulse parameters and initial time selected for intensity decay analysis are crucial to the accurate lifetime calculation. The relation between phosphorescence intensity decay and the parameters of the excitation light pulse is analyzed based on the linear time invariance. it is found that the phosphorescence intensity decay is independent on the parameters of the excitation light pulse after the excitation light vanishing. If the excitation light pulse vanishing moment is selected as the initial time, the accurate lifetime can be obtained. The experimental results from the Oxy-Phor R2 samples excited by different excitation light pulse have proved the above conclusion.

关 键 词：激发光脉冲参量 测量方法 磷光寿命 线性时不变性 单指数拟合 脉冲测量法 

分 类 号：O482.31[理学—固体物理] TN247[理学—物理]