18 November 2014 Pump couplers in a series connection
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The coupling efficiency of the pump coupler determines the pump light injection capacity of a laser system. We have designed a pump coupler in a series connection, of which two or more pump couplers are spliced together through signal fibers to form a new pump coupler with high coupling efficiency and high output power. In the experiment, 3×1 end-pumping couplers and (2+1)×1 side-pumping couplers were made respectively and the two couplers were spliced to form a series connection. Six LDs with output power of about 200 W respectively were spliced with the six pumping arms of the new pump coupler. A total output power of this series connection pump coupler was about 1160 W, corresponding to a coupling efficiency as high as 98%. The loss of signal light was less than 0.4%.
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Xiao Chen, Guangyong Jin, Qirong Xiao, Ping Yan, and Mali Gong "Pump couplers in a series connection", Proc. SPIE 9266, High-Power Lasers and Applications VII, 92661I (18 November 2014); doi: 10.1117/12.2074419; https://doi.org/10.1117/12.2074419


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