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Frontiers of Optoelectronics

Front. Optoelectron.    2016, Vol. 9 Issue (2) : 301-305     DOI: 10.1007/s12200-016-0609-0
Research on multi-kilowatts level tapered fiber bundle N×1 pumping combiner for high power fiber laser
Qirong XIAO,Yusheng HUANG,Junyi SUN,Xuejiao WANG,Dan LI,Mali GONG,Ping YAN()
Center for Photonics and Electronics, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
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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)     
Corresponding Authors: Ping YAN   
Just Accepted Date: 22 February 2016   Online First Date: 29 March 2016    Issue Date: 05 April 2016
 Cite this article:   
Qirong XIAO,Yusheng HUANG,Junyi SUN, et al. Research on multi-kilowatts level tapered fiber bundle N×1 pumping combiner for high power fiber laser[J]. Front. Optoelectron., 2016, 9(2): 301-305.
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Qirong XIAO
Yusheng HUANG
Junyi SUN
Xuejiao WANG
Dan LI
Ping YAN
Fig.1  Manufacturing process of TFB end-pumping combiner
Fig.2  Cross section of the fiber bundles of different combiners
Fig.3  Schematic of the experimental setup for the test of coupling efficiency
Fig.4  Schematic of the test of power handling capacity of 3 × 1 combiner
Fig.5  Output power of 3 × 1 combiner versus pumping power
Fig.6  Coupling efficiency of single input of 7 × 1 combiner
Fig.7  Schematic of the test of power handling capacity of 7 × 1 combiner
Fig.8  Photo of the test of power handling capacity of 7 × 1 combiner
Fig.9  Output power of 7 × 1 combiner versus pumping power
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