摘要
采用棒管法制备了低羟基含量的Tm^(3+)/Ho^(3+)共掺氟碲酸盐微结构光纤。当使用波长为1 560 nm的激光器泵浦Tm^(3+)/Ho^(3+)共掺光纤时,处于Tm^(3+)基态3H6的电子被激发至3F4能级,进一步通过Tm^(3+)和Ho^(3+)间的能量传递过程3F4→3H6(Tm^(3+)):5I8→5I7(Ho^(3+))(能量失配为745 cm-1)布居Ho^(3+)的5I7能级,5I7能级上的电子向5I8能级跃迁发射出2.1μm的光。使用1 560 nm光纤激光器作为泵浦源,18 cm长的Tm^(3+)/Ho^(3+)氟碲酸盐微结构光纤作为增益介质,获得了波长为2 063 nm的激光输出。所得激光的斜率效率为12.9%,激光阈值为163 m W,未饱和的最大输出功率为40 m W。研究结果表明,Tm^(3+)/Ho^(3+)共掺氟碲酸盐微结构光纤可用于制作2.1μm光纤激光器。
Tm^3＋/ Ho^3＋co-doped fluorotellurite microstructure fibers with low concentration of —OH were fabricated by using a rod-in-tube method. Pumped by 1 560 nm fiber laser,electron at Tm^3＋：3H6jump to Tm^3＋∶3F4,and then energy transfer from Tm^3＋to Ho^3＋can occure for the reason of small energy gap（ 745 cm- 1） between Tm^3＋：3F4and Ho：5I7,fluorescence at ～ 2. 1 μm can be obtained with the transition from level of Ho^3＋：5I7to Ho^3＋：5I8. By using a 1 560 nm Er～（3＋）doped fiber laser as the pump source,an all-fiber lasing at 2 063 nm is obtained from a 18 cm Tm^3＋/ Ho^3＋co-doped fluorotellurite microstructure fiber. The corresponding slope efficiency is about 12. 9%,the threshold is 163 m W,and the maximum unsaturated laser output power is 40 m W. The results indicate that the Tm^3＋/ Ho^3＋doped fluorotellurite microstructure fiber is a promising gain medium for 2. 1 μm fiber laser.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2016年第1期74-80,共7页
Chinese Journal of Luminescence
基金
国家自然科学基金(51072065
61178073
60908031
60908001
61077033
61378004)资助项目
