溶胶凝胶法制备的掺铥石英玻璃光谱性质及光纤激光性能(英文)  

Spectral Properties of Tm^(3+)-Doped Silica Glasses and Laser Behaviors of Fibers by Sol-Gel Technology

作　　者：李志兰[1,2] 王世凯 王欣[1,2] 关珮雯 李文涛[1,2] 王孟 于春雷 张磊[1] 李科峰 陈丹平[1] 胡丽丽[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800 [2]中国科学院大学,北京100049

出　　处：《中国激光》2013年第8期136-142,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(60937003)

摘　　要：用溶胶凝胶法制备了摩尔百分比为0.3Tm2O3-0.3xAl2O3-(100-0.3-0.3x)SiO2(x=8,10,15,20)的一系列铥掺杂石英(ATS)玻璃。研究了样品的光谱性质,1811nm处最大发射截面为6.39×10-21 cm2,最长荧光寿命为645μs。样品的最低OH含量为10.5×10-6。采用管棒法制备了光纤预制棒,采用组分为0.3Tm2O3-4.5Al2O3-95.2SiO2的玻璃作为纤芯,八边形的纯石英管作为内包层,用紫外固化剂作为外包层拉制双包层光纤。测量了光纤的激光性质,在66cm长的光纤中得到了最大为1.23W的激光输出,斜率效率为11.7%,激光阈值为6.07W,激光中心波长为1952nm。Tm^3＋ -doped silica glasses with molar fraction composition of 0.3Tin2 O3-0.3xAl2O3-（ 100- 0.3- 0.3 x）SiO2 （x = 8, 10, 15, 20） denoted as ATS glasses are prepared by sol-gel method. The spectroscopic properties of the bulk glasses are investigated. The maximum emission cross section and measured fluorescence lifetime at 1811 nm are 6.39× 10^-21 cm^2 and 645 μs, respectively. The lowest OH content is 10.5 × 10^-6 . The fiber preform was prepared by rod-in-tube method. The glass with composition 0. 3Tm2 O3 -4. 5Al2O3-95.2SiO2 is used as fiber core; the inner cladding is pure silica glass with an octagonal shape; and the outer cladding is ultraviolet curing layer. Laser properties of the fiber are investigated. The maximum laser output power reaches 1.23 W from a 66-cm-long fiber and the slope efficiency is 11.7 %. The lasing threshold is 6.07 W and the lasing wavelength is centered at 1952 nm.

关 键 词：材料 铥掺杂石英光纤 溶胶凝胶法 2ΜM激光 

分 类 号：TN249[电子电信—物理电子学]