Fiber gas laser beyond 4 μm with output power of over 10 W

Chen Qi; Zhou Zhiyue; Ma Pengfei; Li Xuanxi; Pei Wenxi; Lü Guorui; Lei Luohao; Shi Jing; Li Tianyu; Wang Zefeng

doi:10.11884/HPLPB202537.250096

Volume 37 Issue 6

May 2025

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Chen Qi, Zhou Zhiyue, Ma Pengfei, et al. Fiber gas laser beyond 4 μm with output power of over 10 W[J]. High Power Laser and Particle Beams, 2025, 37: 061001. doi: 10.11884/HPLPB202537.250096

Citation:

Chen Qi, Zhou Zhiyue, Ma Pengfei, et al. Fiber gas laser beyond 4 μm with output power of over 10 W[J]. High Power Laser and Particle Beams, 2025, 37: 061001. doi: 10.11884/HPLPB202537.250096

Chen Qi, Zhou Zhiyue, Ma Pengfei, et al. Fiber gas laser beyond 4 μm with output power of over 10 W[J]. High Power Laser and Particle Beams, 2025, 37: 061001. doi: 10.11884/HPLPB202537.250096

Citation:

Chen Qi, Zhou Zhiyue, Ma Pengfei, et al. Fiber gas laser beyond 4 μm with output power of over 10 W[J]. High Power Laser and Particle Beams, 2025, 37: 061001. doi: 10.11884/HPLPB202537.250096

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Fiber gas laser beyond 4 μm with output power of over 10 W

doi: 10.11884/HPLPB202537.250096

Chen Qi^{1, 2
,},
Zhou Zhiyue^{1, 2},
Ma Pengfei^{1, 2},
Li Xuanxi^{1, 2},
Pei Wenxi^{1, 2},
Lü Guorui^{1, 2},
Lei Luohao^{1, 2},
Shi Jing^{1, 2},
Li Tianyu^{1, 2},
Wang Zefeng^{1, 2
,
,}

1.
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
2.
Nan Hu Laser Laboratory, National University of Defense Technology, Changsha 410073, China

Received Date: 2025-04-25
Accepted Date: 2025-05-29
Rev Recd Date: 2025-05-29

Available Online: 2025-05-29

Publish Date: 2025-06-15

Abstract

Abstract

Mid-infrared lasers hold significant application demands in fields such as medicine, communications, and national defense. In recent years, research on mid-infrared fiber lasers has attracted extensive attention worldwide. This work demonstrates a high-power mid-infrared light source at 4.16 μm utilizing HBr gas-filled anti-resonant hollow-core fiber (AR-HCF). By employing a homemade 2 μm single-frequency fiber amplifier as the pump source and utilizing the intrinsic absorption of gas molecules to achieve population inversion, we have realized over 10 W continuous wave mid-infrared output through backward gas-filling method in large-mode-area (AR-HCF). This optimized configuration simultaneously enhances the optical-to-optical conversion efficiency and effectively suppresses thermal accumulation limitations. At the maximum incident pump power of 63.8 W, the system achieves a maximum continuous output power of 10.37 W with corresponding slope efficiency of approximately 16.8%. The beam quality measurement reveals M²<1.1 at maximum power operation. This research verifies the substantial capability of fiber gas lasers to generate high-power mid-infrared radiation, providing valuable insights for advancing the development and investigation of mid-infrared fiber laser technologies.
- fiber laser,
- high power,
- mid-infrared,
- hydrogen bromide,
- hollow-core fiber

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References(8)

References

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