用于S波段放大器的掺铥重金属氧化物玻璃发光性质研究  

Spectroscopic properties of Tm^(3+) ions in heavy metal oxide glasses for S-band optical amplifications

作　　者：杨钢锋[1] 张勤远[1] 石冬梅[1] 邓再德[1] 姜中宏[1] 

机构地区：[1]华南理工大学特种功能材料及其制备新技术教育部重点实验室,广州510640

出　　处：《物理学报》2006年第5期2613-2617,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50472053);华南理工大学特种功能材料及其制备新技术教育部重点实验室研究基金资助的课题~~

摘　　要：制备了不同Tm3+离子浓度的PbO-Bi2O3-Ga2O3-GeO2重金属氧化物玻璃,根据吸收光谱计算了JO强度参量以及Tm3+离子在玻璃中的自发辐射概率、荧光分支比及荧光辐射寿命等光谱参数.通过测量1470nm波段发射光谱,计算表明该玻璃系统在S波段有较宽的荧光半高宽和较大的峰值受激发射截面,但玻璃中荧光寿命随稀土离子浓度增加呈线性下降,而交叉弛豫速率随浓度的平方迅速增加.研究结果仍可表明掺铥重金属氧化物玻璃是一种理想的S波段宽带光纤放大器用基质材料.The spectroscopic properties of Tm^3＋ ions in PbO-Bi2O3-Ga2O3-GeO2 glasses were investigated through the absorption, emission, and lifetime measurements. The JO intensity parameters, the spontaneous emission probability, the fluorescence branching ratio, and the radiative lifetime were calculated using the Judd-Ofelt theory. From the measured 1470nm band emission spectra, we found the FWHM was - 122nm and the peak stimulated emission cross-section was - 2.2 ×10^-21 cm^2 , but the measured lifetimes decreased with the Tm^3＋ ion concentration increasing and the increase of cross relaxation rates was a function of the square of the Tm^3＋ ion concentration. As a result, PbO-Bi203-Ga203-GeO2 glasses were still thought to be a promising host material for potential S-band optical fiber amplifiers.

关 键 词：重金属氧化物玻璃 Tm^3+离子 S波段光纤放大器 光谱性质 

分 类 号：O433[机械工程—光学工程]