Hundred-watt-level high-power femtosecond fiber laser

Tan Xin; Zhao Bianli; Xu Zhiyang; Zhang Rui; Zhou Youyang; Liu Qi; Nan Yinggang; Li Shaopan; Yang Hao; Li Kui; Zhang Xiaoshi

doi:10.11884/HPLPB202638.250252

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Tan Xin, Zhao Bianli, Xu Zhiyang, et al. Hundred-watt-level high-power femtosecond fiber laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250252

Citation:

Tan Xin, Zhao Bianli, Xu Zhiyang, et al. Hundred-watt-level high-power femtosecond fiber laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250252

Tan Xin, Zhao Bianli, Xu Zhiyang, et al. Hundred-watt-level high-power femtosecond fiber laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250252

Citation:

Tan Xin, Zhao Bianli, Xu Zhiyang, et al. Hundred-watt-level high-power femtosecond fiber laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250252

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Hundred-watt-level high-power femtosecond fiber laser

doi: 10.11884/HPLPB202638.250252

Tan Xin^{1, 2
,},
Zhao Bianli^{1, 2},
Xu Zhiyang³,
Zhang Rui^{1, 2},
Zhou Youyang³,
Liu Qi⁴,
Nan Yinggang³,
Li Shaopan⁴,
Yang Hao⁵,
Li Kui^{4
,
,},
Zhang Xiaoshi^{3
,
,}

1.
School of Materials and Energy, Yunnan University, Kunming 650500, China
2.
Southwest United Graduate School, Kunming650092, China
3.
School of Physics and Astronomy, Yunnan University, Kunming 650500, China
4.
School of Engineering, Yunnan University, Kunming 650500, China
5.
School of Chemical Science and Technology, Yunnan University, Kunming 650500, China

Received Date: 2025-08-05
Accepted Date: 2025-11-10
Rev Recd Date: 2025-11-22

Available Online: 2025-11-29

Abstract

Abstract

Background
High-power femtosecond fiber lasers are essential tools for advanced applications in ultrafast science, precision manufacturing, and nonlinear optics. However, achieving hundred-watt-level output while maintaining high beam quality and short pulse duration remains challenging due to nonlinear effects and transverse mode instabilities.
Purpose
This work aims to develop a high-power femtosecond fiber laser system based on chirped-pulse amplification (CPA), using rod-type photonic crystal fiber as the gain medium, to achieve hundred-watt-level output with high efficiency and stable beam quality.
Methods
The system adopts a rod-type photonic crystal fiber as the main amplifier. Backward pumping combined with double-pass amplification in a single rod fiber is implemented to enhance pump-to-signal conversion efficiency. Nonlinear effects are mitigated by employing a large mode area fiber, short gain length, and proper chirped-pulse management. A double-grating compressor is used for final pulse compression.
Results
The amplifier achieves a pump-to-signal conversion efficiency exceeding 60%. The system delivers pulses with a central wavelength of 1033 nm, a repetition rate of 1 MHz, a single-pulse energy of 162 μJ, and a pulse duration of 233 fs. The output beam ellipticity is better than 95%. The overall pump-to-compressed-signal efficiency reaches 54%.
Conclusions
The demonstrated system achieves high repetition rate, high average power, and ultrashort pulse duration simultaneously, providing a novel and practical scheme for hundred-watt-level femtosecond fiber lasers. This approach offers new opportunities for applications requiring stable, high-brightness ultrafast sources.
- high power laser,
- ultrafast fiber laser,
- chirped pulse amplification,
- photonic crystal fiber

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References(20)

References

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