Research on multi-kilowatts level tapered fiber bundle N×1 pumping combiner for high power fiber laser

Abstract

Pumping combiner is a kernel component of high power fiber laser (HPFL). We demonstrate two types of tapered fiber bundle (TFB) end-pumping combiner able to combining multi-kilowatts of pumping laser. After the experimental test of coupling performance, the 3×1 coupler is proved to have a power handling capacity of 2.11 kW with a coupling efficiency of 95.1%, and the 7×1 coupler is capable of handling pumping power of 4.72 kW with a coupling efficiency of 99.4%. These two coupler have obtained the ability to be used in laser diodes (LDs) direct beam combining and the pumping coupling of multi-kilowatts level fiber lasers.

Keywords

high power fiber laser (HPFL) / pumping combiner / tapered fiber bundle (TFB)

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Acknowledgements

This work was supported in part by the National Natural Science Foundation of China (Grant No. 61307057).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg