980nm激光泵浦下掺Er^(3+)碲酸盐玻璃的光子雪崩上转换  

Photon Avalanche Upconversion in Er^(3+)-Doped Telluride Glass Excited by 980 nm Laser

作　　者：李玉琼[1] 孙真荣[1] 王祖赓[1] 

机构地区：[1]光谱学与波谱学教育部重点实验室华东师范大学物理系,上海200062

出　　处：《光谱学与光谱分析》2006年第6期977-979,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(10234030和10374030);国家重大基础研究项目(1999075200);教育部新世纪人才计划(NCET-04-0420);上海市光科技项目(036105019);上海市教育委员会曙光学者计划资助

摘　　要：在980 nm激光二极管的抽运下,掺Er3+碲酸盐玻璃辐射出很强的绿色上转换荧光,荧光强度与抽运功率呈非线性关系,发光强度和积累时间与激光抽运功率的关系研究表明存在雪崩阈值44 mW。发现光子的积累时间(几十毫秒量级)远大于荧光的寿命,且积累时间随抽运功率的增大而减小。与早先报道的690和579 nm抽运波长相比,980 nm是更加有效的抽运波长。By laser excitation at the wavelength of 980 nm, efficient upconversion emission at 550 nm was observed in Er^3＋ doped telluride glass. The upconversion intensity varies nonlinearly with the excitation power with a threshold of 44 mW. The photon response time, of the order of tens of milliseconds, is much longer than the emission lifetimes. Moreover, the response time decreases with the increase in excitation power. The power dependence of the intensity and response time indicates that the green emission is generated through photon avalanche upconversion. Compared with 690 or 579 nm excitation wavelength, 980 nm is more efficient.

关 键 词：上转换 光子雪崩 掺Er^3+碲酸盐玻璃 

分 类 号：O482.3[理学—固体物理]