Author： Xiao Chen Qi-Rong Xiao Guang-Yong Jin Ping Yan Ma-Li Gong
Publisher： IOP Publishing
E-ISSN： 1741-4199|24|6|64208-64213
ISSN： 1674-1056
Source： Chinese Physics B, Vol.24, Iss.6, 2015-06, pp. : 64208-64213
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Abstract
The coupling efficiency of the pump coupler determines the pump light injection capacity of a laser system. Experimental analysis of the influences of different factors on the pump coupling efficiency is in accordance with this conclusion. We use two Nufern fibers (400 μm/440 μm with NA = 0.22) as pump arm, one Nufern fiber (20 μm/400 μm with NA = 0.06/0.46) as a main fiber to make a side-pumping (2+1)× 1 coupler. The experimental result shows that the total output power of this (2+1)× 1 coupler is about 1160 W, corresponding to a coupling efficiency as high as 98.6%. The loss of signal light is less than 1%.
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