高功率掺Yb^(3+)双包层光纤激光器热过程分析  

Thermal analysis of Yb^(3+) doped double cladding high power fiber laser

作　　者：白冰[1] 郭长利 炎正馨[1] 齐兵[1] 高峰[1] 乔辉[1] 

机构地区：[1]西安科技大学理学院,西安710054

出　　处：《激光杂志》2017年第9期14-16,共3页Laser Journal

基　　金：西安科技大学培育基金(201707);陕西省教育厅科研计划项目资助(16JK1516)

摘　　要：本文建立了适合于光纤激光器实际理论模型为基础,结合实际给出适当的possion方程,适当的边界条件和边界温度连续性条件,利用Taylor函数展开的方法,推导出高功率掺Yb^(3+)双包层光纤激光器温度场解析表达式。研究结果表明:本文均采用双端泵浦形式,泵浦功率为400W,泵浦中心区域最高温升499.6K,低于SiO_2晶体熔点的24.9%,本文推导出温度场的解析表达式与其他文献的温度场做相关比较,所得到的数值结果更加精确,证明所得结果正确;同时也分析了影响纤芯处温度升高的条件,为了使激光输出特性不受影响的前提下,提出了适当增大包层半径,适当增大热交换系数和适当降低吸收系数等方法来降低纤芯处的温度升高,同时纤芯处温度和激光输出功率达到最佳匹配。本文所得结果能为优化光纤激光器提供理论支持。The temperature field expression of the Yb^3 ＋ doped double cladding high power fiber laser is deduced by the expanded Taylor function method base on the actual model of fiber laser under the appropriate possion equation, the boundary conditions and continuous temperature conditions. The results show that when the double-end pumped power of400W, The maximum center temperature rise by 499.6K, which lower than the melting point of the SiO2 24.9%. At the same time, the temperature field expression deduced in this paper is more accurate and correct than that of other literature. The conditions for the temperature rising at the center of the fiber are also analyzed. The appropriate increase in the radius of the cladding is put forward when the laser output characteristics are not affected. Appro- priately increase the thermal exchange coefficient, appropriately reduce the absorption coefficient and other methods to avoid fiber center temperature rising, and to get the best match of the center temperature and output power. These results provide a theoretical basis for the optimized design of the fiber laser.

关 键 词：双包层光纤激光器 热效应 温度场 双端泵浦 

分 类 号：TN248[电子电信—物理电子学]