方波激发下Er^3＋上转换绿光发光动力学过程的研究  

Studies on the dynamic process of up-conversion green emission from Er^(3+) under square wave excitation

作　　者：董力强[1] 黄世华[1] 贾晓霞[2] 陈宝玖[3] 

机构地区：[1]北京交通大学光电子技术研究所,发光与光信息技术教育部重点实验室,北京100044 [2]北京航空航天大学电子信息工程学院,北京100083 [3]大连海事大学物理系,大连116026

出　　处：《物理学报》2009年第3期2061-2066,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10434030,10774012);北京交通大学基金(批准号:2006XM038,2007XM048)资助的课题~~

摘　　要：用方波电源驱动808nm,980nm激光二极管(LD)激发Er3+掺杂的亚碲酸盐氟氧化物玻璃,测量2H11/2,4S3/2能级上转换发光的上升和衰减,不同波长激发下的上升时间常数不同,说明808nm LD和980nm LD激发下2H11/2,4S3/2能级上转换激发途径不同.通过建立速率方程模型分析了4S3/2能级的上升特性与中间能级寿命的关系,从而确定了两种波长激发下上转换绿光的激发机理.The rise and decay curves of Er 3＋ 2H 11/2 and 4S 3/2 upconversion emission in oxyfluoride tellurite glass were measured under the excitation of 808 nm and 980 nm light from laser diodes driven by square wave. Different rise times under 808 nm and 980 nm excitation reveals different excitation paths. Relationship between build-up process of the upconversion emission and lifetime of the intermediate state was analyzed with the rate equations. Excitation processes of the green upconversion emission under 808 nm and 980 nm excitation were confirmed. Square wave excited upconversion emission may also be used for measuring lifetimes of infrared energy levels with a conventional photomultiplier tube.

关 键 词：上转换 激发过程 ER^3+ 方波激发 

分 类 号：O482.31[理学—固体物理]