光纤激光器受激布里渊散射的建模与求解

从理论上分析了高功率双包层光纤激光器的受激布里渊散射效应,建立了考虑受激布里渊散射的光纤激光器速率方程,并采用打靶法对其求解,对数值求解算法进行了详尽的描述。通过比较不同的纤芯直径、光纤长度以及掺杂浓度的情况下输出激光功率极限值的不同,发现增大纤芯直径、减小光纤长度以及降低掺杂浓度可以有效地减少受激布里渊散射的影响。

The Modeling and Solving of Stimulated Brillouin Scattering in Fiber Laser

SBS effect in high power double clad fiber laser is investigated theoretically in this paper.A numerical model based on rate equations with SBS included is obtained,and it is solved using an algorithm with shooting method.The algorithm for solving the rate equation is well explained.By comparing the limit of output power when core diameter,fiber length or doped concentration varies,we could find that SBS can be suppressed significantly when core diameter is increased,fiber length is decreased or doped concentration is reduced.