铋掺杂锗酸盐玻璃超宽带近红外发光性质及机理  

Ultra Broadband Near Infrared Emission Properties of Bi-doped Germanate Glasses

作　　者：王荣飞[1] 周大成[1] 杨正文[1] 宋志国[1] 张景绘[1] 邱建备[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《硅酸盐学报》2013年第7期1015-1018,共4页Journal of The Chinese Ceramic Society

基　　金：国家重点基础研究发展计划"973"项目(2011CB211708);国家自然科学基金(51002068;51272097;61265004);云南省应用基础研究青年基金(2012FD009)资助项目

摘　　要：采用传统的高温熔融法制备了80GeO2–20RO(R=Ca,Sr,Ba)掺铋锗酸盐玻璃。研究了铋掺杂锗酸盐玻璃超宽带近红外发光性质,探讨了铋离子掺杂玻璃超宽带发光机理。结果表明:在808nm激光激发下,铋掺杂锗酸盐玻璃随着碱土金属离子半径增加,中心波长为1300nm的发射强度逐渐降低;在690 nm激光激发下,铋掺杂锗酸盐玻璃的近红外发射覆盖从900 nm到2 000 nm波段但不呈现正态分布,荧光半高宽达428 nm。随着碱土金属离子半径的增加,其近红外发射中心位置逐渐向长波方向移动,推测近红外发光可能源于两种不同形式铋的发光中心。铋掺杂的锗酸盐玻璃具有良好的光学性能,较宽的荧光半高宽,将成为未来超宽带光纤放大器的增益介质。The Bi-doped germanate glass with the molar composition of 80GeO2-20RO （R = Ca, Sr, Ba） was prepared by a conven- tional melting-quenching technique. The broadband infrared luminescence properties of the glasses were investigated, The infrared luminescence intensity decreases with the increase of the radius of alkaline earth ion under 690 nm and 808 nm excitation, respectively. The excitation at 690nm produces a emission band in the range from 900 to 1 900nm, and the full width at halfa maximum （FWHM） of broad infrared fluorescence reaches up to 428 urn. It is suggested that the infrared emissions could be due to the presence ofBi＋ and BiO. The bismuth-doped germanate glass has a superior optical performance with broad FWHM, which could be used as a gain medium of super broadband fiber amplifier in future.

关 键 词：铋离子掺杂锗酸盐玻璃 红外发光 光学性质 

分 类 号：TQ171[化学工程—玻璃工业]