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

doi:10.1007/s12200-016-0609-0

Front. Optoelectron.

2016, Vol. 9

Issue (2) : 301-305 https://doi.org/10.1007/s12200-016-0609-0

RESEARCH ARTICLE

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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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)

Corresponding Author(s): 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.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-016-0609-0
https://academic.hep.com.cn/foe/EN/Y2016/V9/I2/301

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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