Home-Made 10 kW Fiber Laser with High Efficiency

Xiaolong, 陈晓龙 Chen; Fengguang, 楼风光 Lou; Yu, 何宇 He; Meng, 王孟 Wang; Zhongwei, 徐中巍 Xu; Xiaochen, 郭晓晨 Guo; Ren, 叶韧 Ye; Lei, 张雷 Zhang; Chunlei, 于春雷 Yu; Lili, 胡丽丽 Hu; Bing, 何兵 He; Jun, 周军 Zhou

doi:10.3788/aos201939.0336001

Cited by 14 publications

(1 citation statement)

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“…In 2018, a fiber amplifier with an output power of 10.6 kW and a slope efficiency of 86.12% was reported based on ytterbium-doped fiber (YDF) with a core/inner-cladding diameter of 30/900 µm and 976 nm LDs [4]. In 2019, a 10.14 kW laser amplifier based on YDF with a core/inner-cladding diameter of 30/600 µm and a 976 nm bidirectional pump scheme was obtained [5]. However, to increase the stimulated Raman scattering (SRS) threshold, all these systems chose to use active fibers with a very large core diameter, which led to bad beam qualities.…”

Section: Introductionmentioning

confidence: 99%

Effective suppression of stimulated Raman scattering in direct laser diode pumped 5 kilowatt fiber amplifier using chirped and tilted fiber bragg gratings

et al. 2020

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We report here for the first time, to the best of our knowledge, a direct laser diodes pumped 5 kW 1080 nm fiber amplifier using chirped and tilted fiber Bragg gratings (CTFBGs) to suppress stimulated Raman scattering (SRS). With one or two CTFBGs, which are carefully designed and fabricated to match the Raman gain spectrum, inserted between the seed and the amplifier stage, effective SRS suppression is obtained. The maximum suppression ratio is about 20 dB with one CTFBG and 27.5 dB with two when the amplifier operates at 5 kW, with beam quality factor M 2 of ~1.8. By further improving the performance of CTFBGs and using more CTFBGs in a series, a better SRS suppression effect could be achieved, which is very useful for further power scaling of all-fiber laser systems.

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Section: Introductionmentioning

confidence: 99%

Effective suppression of stimulated Raman scattering in direct laser diode pumped 5 kilowatt fiber amplifier using chirped and tilted fiber bragg gratings

et al. 2020

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High‐Power Laser Systems

Zuo

Xin

2022

Laser & Photonics Reviews

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High‐power laser sources are widely used in industrial precision processing and act as a new platform for strong‐field physics research using peak power over petawatt. This review focuses on realizing high‐energy solid‐state disk and slab systems and the nonlinear‐suppression strategies for high‐power fiber systems using the functional fibers. First, the implementations and enabling technologies of the solid‐state lasers for increasing peak power from gigawatt to petawatt are reviewed. Then the mechanisms and suppression strategies of the deterioration effects (including stimulated Raman scattering, stimulated Brillouin scattering, and transverse mode instability) in various fiber amplifiers are analyzed. At the same time, the mechanism and achievements of the current functional fibers are introduced. Finally, the challenges and perspectives of high‐power solid‐state and fiber amplifiers are summarized.

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