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13 March 2018 High pumping-power fiber combiner for double-cladding fiber lasers and amplifiers
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A high pumping-power fiber combiner for backward pumping configurations is fabricated and demonstrated by manufacturing process refinement. The pump power handling capability of every pump fiber can extend to 600 W, corresponding to the average pump coupling efficiency of 94.83%. Totally, 2.67-kW output power with the beam quality factor M2 of 1.41 was obtained, using this combiner in the fiber amplifier experimental setup. In addition, the temperature of the splicing region was less than 50.0°C in the designed combiner under the action of circulating cooling water. The experimental results prove that the designed combiner is a promising integrated all-fiber device for multikilowatt continuous-wave fiber laser with excellent beam quality.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2018/$25.00 © 2018 SPIE
Jinkun Zheng, Wei Zhao, Baoyin Zhao, Zhe Li, Chang Chang, Gang Li, Qi Gao, Pei Ju, Wei Gao, Shengfei She, Peng Wu, Chaoqi Hou, and Weinan Li "High pumping-power fiber combiner for double-cladding fiber lasers and amplifiers," Optical Engineering 57(3), 036105 (13 March 2018).
Received: 21 November 2017; Accepted: 13 February 2018; Published: 13 March 2018

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