14 November 2017 Side-pumping combiner for high-power fiber laser based on tandem pumping
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Abstract
We investigate a ( 2 + 1 ) × 1 side-pumping combiner numerically and experimentally for high-power fiber laser based on tandem pumping for the first time. The influence of taper ratio and launch mode on the 1018-nm pump coupling efficiency and the leakage power into the coating of the signal fiber (LPC) is analyzed numerically. A side-pumping combiner is developed successfully by tapered-fused splicing technique based on the numerical analysis, consisting of two pump fibers ( 220 / 242    μ m , NA = 0.22 ) and a signal fiber ( 40 / 400    μ m , NA = 0.06 / 0.46 ). The total 1018-nm pump efficiency of the combiner is 98.1%, and the signal light insertion loss is < 3 % . The results show that, compared with laser diodes pumping, the combiner appears to have a better LPC performance and power handling capability when using 1018-nm fiber as the pump light. Meanwhile, an all-fiber MOPA laser based on tandem pumping with 1080-nm output of 2533 W and the slope efficiency of 82.8% is achieved based on the home-made combiner.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yanran Gu, Yanran Gu, Chengmin Lei, Chengmin Lei, Jun Liu, Jun Liu, Ruixian Li, Ruixian Li, Le Liu, Le Liu, Hu Xiao, Hu Xiao, Zilun Chen, Zilun Chen, } "Side-pumping combiner for high-power fiber laser based on tandem pumping," Optical Engineering 56(11), 116109 (14 November 2017). https://doi.org/10.1117/1.OE.56.11.116109 . Submission: Received: 6 July 2017; Accepted: 10 October 2017
Received: 6 July 2017; Accepted: 10 October 2017; Published: 14 November 2017
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