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侧面耦合高功率泵浦光技术是获得高功率稀土光纤激光器的关键技术之一。介绍了一种用于侧面泵浦高功率双包层光纤激光器的表面弧形金属槽结构的制作工艺,并且针对已经实验制作出来的表面连续弧形金属凹槽的侧面耦合结构进行了严格的矢量电磁场理论计算,将120°弧形凹槽等效近似为多层等高不等宽的矩形槽并运用透射矩阵算法对这种近似后的多层矩形结构进行优化设计。这种结构可以用于大功率激光二极管阵列的侧面泵浦中,尤其可用于条形半导体激光器侧面泵浦双包层掺杂光纤,以制作各种大功率稀土光纤激光器。
Side-coupled high-power pump light technology is one of the key technologies for obtaining high-power rare earth fiber lasers. A process of fabricating a surface arc-shaped metal trench structure for a side-pumped high-power double-clad fiber laser is introduced, and a stringent vector is implemented for the experimentally produced side-surface coupling structure of continuously curved metal grooves According to the theory of electromagnetic field, the 120 ° arc-shaped groove is equivalently approximated to a multi-level rectangular groove with unequal width and the transmission matrix algorithm is used to optimize the multi-layer rectangular structure after the approximation. This structure can be used for side-pumping of high-power laser diode arrays, especially for side-pumped double-clad doped fibers of bar-type semiconductor lasers to fabricate various high-power rare earth fiber lasers.