%A Qirong XIAO,Yusheng HUANG,Junyi SUN,Xuejiao WANG,Dan LI,Mali GONG,Ping YAN %T Research on multi-kilowatts level tapered fiber bundle N×1 pumping combiner for high power fiber laser %0 Journal Article %D 2016 %J Front. Optoelectron. %J Frontiers of Optoelectronics %@ 2095-2759 %R 10.1007/s12200-016-0609-0 %P 301-305 %V 9 %N 2 %U {https://journal.hep.com.cn/foe/EN/10.1007/s12200-016-0609-0 %8 2016-04-05 %X

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.