S+C+L超宽带光源的研究

Study on S+C+L ultra broadband light sources

为了得到一种高性能的S+C+L波段的超带宽光纤光源,采用一种新型的混合掺杂的光纤作为传输媒质,通过用激光二极管作为抽运源抽运掺铒光纤和掺铥光纤,用两个3dB宽带耦合器作为光纤反射镜,同时利用功率控制电路让光源输出光稳定,对设计的光源进行了实验和理论验证,得到了总功率为28mW、带宽1460nm～1610nm的S+C+L波段的超带宽光纤光源。结果表明,光纤环形镜的使用,不仅改善了光源的平坦度,并且大大提高了光光转换效率。

In order to obtain high performance S ＋ C ＋ L optical fiber light sources with ultra bandwidth and taking a new hybrid-doped optical fiber as transmission medium and taking laser diodes pumping thulium-doped and Er-doped optical fibers, with two 3dB wide band couplers as the optical fiber reflector, a new fiber laser was designed and its energy was controlled stable with the help of a power control circuit. Experiments and the theoretical analysis were carried out. The total output was 28mW with bandwidth from 1460nm to 1610nm in the S ＋ C ＋ L wave band. The experimental results indicate optical-fiber-loop mirrors not only improve the flatness of the light source but also enhance the light-to-light conversion efficiency greatly.