基于^1S0能级的Pr^3＋：ZBLAN光纤上转换紫外激光的数值模拟  

Numerical Simulations of Pr^(3+):ZBLAN Upconversion Ultraviolet Fiber Laser Based on ~1S_0 Level

作　　者：罗涛[1,2] 戴振文[1] 

机构地区：[1]吉林大学物理学院,相干光与原子分子光谱教育部重点实验室,吉林长春130023 [2]长春师范学院物理学院,吉林长春130032

出　　处：《中国激光》2008年第1期55-60,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(10104009)资助项目

摘　　要：在Pr3+∶ZBLAN光纤中,运用粒子数速率方程理论,研究用586 nm和335 nm连续激光双光子激发4f组态最高能级1S0,以1S0和3F4为激光上下能级实现250 nm上转换紫外激光的动力学行为,得到阈值抽运功率、激光输出功率、斜率效率和最佳光纤长度等激光参数。结果表明,阈值抽运功率随光纤长度增加而增大,斜率效率随光纤长度增加而减小,光纤较短时,无法获得较高输出功率。掺杂浓度越大则阈值抽运功率越小,斜率效率越大。在选取的特定条件下,斜率效率最高可达16.7%。The theory of population rate equations was used to investigate the kinetics of upconversion ultraviolet laser based on the highest level ^1SO of 4f configuration in Pr^3＋ ： ZBLAN fiber. 586 nm and 335 nm pumping lasers are used to populate ^1S0 level through stepwise two photon absorption, and 250 nm ultraviolet （UV） continuous wave （CW） laser can be achieved by laser transition from ^1S0 to ^3F4. The threshold pump powers, output power, slope efficiency and optimum cavity length are calculated. The results show that the threshold pump power increases with the fiber length, and slope efficiency decreases with the increase of fiber length. Higher output power cannot be obtained in a short fiber. Moreover, higher doping concentration makes laser oscillate with lower threshold pump Dowers but higher slope efficiency. The best slope efficiency is 16.7% in the conditions taken in this paper.

关 键 词：激光物理 上转换紫外激光 粒子数速率方程 ^1S0 能级 Pr^3+:ZBLAN光纤 

分 类 号：TN241[电子电信—物理电子学]