提出了一种双包层光纤激光器侧面耦合技术——微棱镜反射式侧面耦合技术, 能高效且方便地将半导体激光器, 特别是高功率半导体激光器阵列和叠层的抽运光耦合进双包层光纤中。该技术具有结构简单、加工难度小、抽运效率高、对光纤本身无损伤等特点, 更重要的是该技术非常适合半导体激光器列阵的多点抽运。详细阐述了微棱镜反射式耦合技术的基本原理和具体使用方法, 理论计算所得耦合效率超过90%, 并进行了初步的实验研究, 得到了超过50%的耦合效率。通过分析, 对光源和棱镜具体尺寸参数提出了具体要求, 并指出了其应用范围。

A new method for side pumping of double-clad fiber lasers through reflection of micro-prism is described, which can pump the light sources from LDs, especially LD arrays, into double-clad fibers easily and effectively. Advantages of this technique include no destruction of inner-cladding, high pumping efficiency, simplicity, low cost, easy industrialization and so on. The mechanism and the application method are introduced and the theoretical coupling efficiency is given (up to 90%). Then primary experiment is made to verify the method and 50% coupling efficiency is gotten. The parameters of the prism and the applied areas is analged.