5 kW all-fiber amplifier based on homemade spindle-shaped Yb-doped fiber

Xi Xiaoming; Yang Huan; Zeng Lingfa; Huang Liangjin; Ye Yun; Zhang Hanwei; Pan Zhiyong; Wang Xiaolin; Wang Zefeng; Zhou Pu; Xu Xiaojun; Chen Jinbao

doi:10.11884/HPLPB202133.200309

Volume 33 Issue 2

Jan. 2021

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Article Navigation > High Power Laser and Particle Beams > 2021 > 33(2): 021001

Xi Xiaoming, Yang Huan, Zeng Lingfa, et al. 5 kW all-fiber amplifier based on homemade spindle-shaped Yb-doped fiber[J]. High Power Laser and Particle Beams, 2021, 33: 021001. doi: 10.11884/HPLPB202133.200309

Citation:

Xi Xiaoming, Yang Huan, Zeng Lingfa, et al. 5 kW all-fiber amplifier based on homemade spindle-shaped Yb-doped fiber[J]. High Power Laser and Particle Beams, 2021, 33: 021001. doi: 10.11884/HPLPB202133.200309

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5 kW all-fiber amplifier based on homemade spindle-shaped Yb-doped fiber

doi: 10.11884/HPLPB202133.200309

1.
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
2.
State Key Laboratory of Pulsed Power Laser Technology, Changsha 410073, China
3.
Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha 410073, China

Received Date: 2020-11-16
Rev Recd Date: 2021-01-06
Publish Date: 2021-01-07

Abstract

Abstract

To enhance the thresholds of both stimulated Raman scattering and transverse mode instability, we proposed a novel active Yb-doped fiber with a spindle-shaped core and inner-cladding. An all-fiber main oscillator power amplifier (MOPA) was experimentally established based on this homemade fiber. A maximum power of 5 kW was achieved with the optical-to-optical efficiency of 66.6%, Raman-suppression ratio of ＞45 dB and M² factor of about 2.0. We believe that the brightness and the efficiency of the laser can be improved by optimizing the structure of the Yb-doped fiber.
- fiber laser,
- fiber amplifier,
- tapered fiber,
- stimulated Raman effect,
- transverse mode instability

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References(10)

References

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