Review of High Power Fiber Laser Pump Coupling Technology

Xiao, Qirong; Dayong, 张大勇 Zhang; Zehui, 王泽晖 Wang; Yusheng, 黄昱升 Huang; Liming, 张利明 Zhang; Dan, 李丹 Li; Ping, 闫 平 Yan; Mali, 巩马理 Gong

doi:10.3788/cjl201744.0201008

Cited by 2 publications

(1 citation statement)

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“…As a key component of high power fiber lasers, the fiberbased power combiner is able to combine multiple ports of laser inputs into one output fiber [3][4][5]. Tapered fiber bundle (TFB) technology, has been proven to be one of the most effective techniques to fabricate all-fiber power combiners [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

19 × 1 high power pump combiner with large input core diameter

Zhang¹,

Lei²,

Li³

et al. 2021

Laser Phys.

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In this paper, we investigate a 19 × 1 tapered fiber bundle (TFB) pump combiner for high power fiber lasers theoretically and experimentally, based on the twist method. Theoretically, we analyze the influence of the taper length, taper ratio and twist angle on the performance of a 19 × 1 TFB combiner by using the beam propagation method. Then, a 19 × 1 all-fiber combiner is fabricated experimentally, with input fibers and output fiber having core/clad diameter of 220/242 μm (numerical aperture (NA) = 0.22) and 30/600 μm (NA = 0.06/0.46) respectively. The transmission efficiency of each port is higher than 98.6% and the average efficiency of all 19 ports is 99.3%. The combiner achieved an output power of 1.5 kW with transmission efficiency of 99.3% when tested with four ports of 976 nm laser diode. To our best knowledge, this is the first time that 220/242 μm (NA = 0.22) multimode fibers act as the pump fibers of a 19 × 1 end-pumping combiner.

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