超宽带光放大用新型发光材料  

NOVEL LUMINESCENT MATERIALS FOR SUPER-BROADBAND OPTICAL AMPLIFICATION

作　　者：周时凤[1] 徐时清[1] 邱建荣[1] 

机构地区：[1]浙江大学材料科学与工程学系,杭州310027

出　　处：《硅酸盐学报》2006年第9期1130-1136,共7页Journal of The Chinese Ceramic Society

基　　金：中国博士后科学基金(2005038020)资助项目

摘　　要：介绍了具有ns2np1电子构型的金属离子(原子)掺杂玻璃,过渡金属离子掺杂微晶玻璃和半导体量子点等在近红外光通讯波段具有超宽带发光的新型发光材料。具有ns2np1电子构型的铋掺杂玻璃的σem(发射截面)和σem·.FWHM(fullwidthathalfmaximum)值分别是掺铒光纤放大器的2～3倍和10倍,σem·τ(荧光寿命)的值是掺钛蓝宝石的3倍。过渡金属离子掺杂微晶玻璃结合了玻璃的易加工性和透明晶体具有高效宽带发光的优点。半导体量子点可利用量子尺寸效应,具有可调节红外宽带发光中心波长等特点。上述材料可能用于宽带光纤放大器的增益介质。探讨了其发光机理并展望了今后的研究方向。Novel luminescent materials such as glasses doped with metal ions （atoms） with ns^2np^1 outmost electron configurations, transition metal ion-doped glass-ceramics as well as semiconductor quantum dots are described. The luminescent materials exhibit super-broadband emission in the near-infrared range overlapping the telecommunication wavelength range of 1 100-1 700 nm. The emission cross section O＇em and the product of σcm·FWHM （full width at half maximum） of bismuth （with ns^2np^1 outmost electron configurations） doped glasses are 2-3 and 10 times larger than those of Er-doped glass used for Er-doped fiber amplifier, respectively, and the product σcm·τ （fluorescent lifetime） is 3 times larger than that of Ti-doped sapphire. Transition metal ion-doped glass-ceramics can combine the advantages of easy process ability of glass and high emission efficiency in broadband of transparent crystal. Due to the quantum size effect, semiconductor quantum dot nanocrystals can be used to adjust the wavelength of the luminescence center for broadband infrared emission. These materials may be promising as gain medium for ultra-broadband optical amplification. The luminescence mechanisms and the direction for future development of the materials are also discussed.

关 键 词：超宽带光纤放大器 近红外宽带发光 宽带通讯 发光材料 

分 类 号：TQ171[化学工程—玻璃工业]