Achievement of 1.94 kW output power in a monolithic 1 018 nm fiber laser

Zhang Yijie; Li Dan; Liao Junyi; Yang Yousi; Li Guanzhong; Guo Zhiyang; Li Pei; Yan Ping; Liu Qiang; Xiao Qirong

doi:10.11884/HPLPB202638.250429

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Article Navigation > High Power Laser and Particle Beams > 2026 > Accepted Manuscript

Zhang Yijie, Li Dan, Liao Junyi, et al. Achievement of 1.94 kW output power in a monolithic 1 018 nm fiber laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250429

Citation:

Zhang Yijie, Li Dan, Liao Junyi, et al. Achievement of 1.94 kW output power in a monolithic 1 018 nm fiber laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250429

Zhang Yijie, Li Dan, Liao Junyi, et al. Achievement of 1.94 kW output power in a monolithic 1 018 nm fiber laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250429

Citation:

Zhang Yijie, Li Dan, Liao Junyi, et al. Achievement of 1.94 kW output power in a monolithic 1 018 nm fiber laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250429

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Achievement of 1.94 kW output power in a monolithic 1 018 nm fiber laser

doi: 10.11884/HPLPB202638.250429

Zhang Yijie^{1, 2
,},
Li Dan^{1, 2},
Liao Junyi^{1, 2},
Yang Yousi^{1, 2},
Li Guanzhong^{1, 2},
Guo Zhiyang^{1, 2},
Li Pei^{1, 2},
Yan Ping^{1, 2},
Liu Qiang^{1, 2},
Xiao Qirong^{1, 2
,
,}

1.
Department of Precision Instrument, Tsinghua University, Beijing 100084, China
2.
State Key Laboratory of Precision Space-time Information Sensing Technology, Beijing 100084, China

Received Date: 2025-11-29
Accepted Date: 2026-02-09
Rev Recd Date: 2026-02-11

Available Online: 2026-03-10

Abstract

Abstract

Background
Tandem pumping scheme is commonly employed for high power fiber laser systems, where the 1 018 nm fiber laser serves as the most prevalent pump source. However, the output power of monolithic 1 018 nm fiber lasers is limited to one-kilowatt level due to the amplified spontaneous emission (ASE) effect. This limitation necessitates the use of a large number of these pump sources in tandem-pumped fiber laser systems, resulting in bulky and complex configurations.
Purpose
This paper presents a modeling and optimization framework for scaling the power of 1 018 nm fiber lasers.
Methods
The framework, built upon the beam propagation method and broad-spectrum rate equations, targets the optimization of critical parameters to strategically balance laser efficiency against signal-to-ASE ratio.
Results
Guided by the framework, a bidirectional pumping scheme was employed alongside an optimized fiber coil diameter, which effectively suppressed both ASE and the transverse mode instability. This approach enabled a monolithic output power of 1.94 kW at 1 018 nm, with an optical-to-optical efficiency of 76.38%, a signal-to-ASE ratio of 33.22 dB, and a beam quality factor M² of 1.91.
Conclusions
By achieving a monolithic 2-kW 1 018 nm laser, this work enhances the compactness and integration of high-power fiber lasers with tandem pumping scheme, thus enabling future breakthroughs in the power and brightness scaling of tandem-pumped fiber lasers.
- fiber laser,
- tandem pumping scheme,
- high power laser,
- amplified spontaneous emission,
- transverse mode instability

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References(34)

References

[1]	Tamura K, Ishigami R, Yamagishi R. Laser cutting of thick steel plates and simulated steel components using a 30 kW fiber laser[J]. Journal of Nuclear Science and Technology, 2016, 53(6): 916-920. doi: 10.1080/00223131.2015.1080633
[2]	Ascari A, Angeloni C, Liverani E, et al. High speed laser cutting of ultrathin metal foils for battery cell production[J]. Journal of Laser Applications, 2023, 35: 042063. doi: 10.2351/7.0001091
[3]	Boutinguiza M, del Val J, Riveiro A, et al. Synthesis of titanium oxide nanoparticles by ytterbium fiber laser ablation[J]. Physics Procedia, 2013, 41: 787-793. doi: 10.1016/j.phpro.2013.03.149
[4]	Sotsuka Y, Nishimoto S, Tsumano T, et al. The dawn of computer-assisted robotic osteotomy with ytterbium-doped fiber laser[J]. Lasers in Medical Science, 2014, 29(3): 1125-1129. doi: 10.1007/s10103-013-1487-y
[5]	阳优司, 李丹, 吉恩才, 等. 掺铥光纤激光器及其碎石应用: 进展与展望[J]. 激光与光电子学进展, 2023, 60: 1500007 doi: 10.3788/LOP221852 Yang Yousi, Li Dan, Ji Encai, et al. Thulium-doped fiber laser and its applications in laser lithotripsy: progress and prospect[J]. Laser & Optoelectronics Progress, 2023, 60: 1500007 doi: 10.3788/LOP221852
[6]	Rao Binyu, Tang Hengyu, Gan Yufei, et al. 4.2 kW, 0.11 nm, near single-mode isolator-free narrow-linewidth fiber laser of a one-stage amplifier seeded by a taped fiber oscillator[J]. Optics Express, 2025, 33(22): 45656-45667. doi: 10.1364/OE.576605
[7]	Yang Yousi, Li Dan, Zhang Yijie, et al. 3 kW narrow-linewidth linearly polarized fiber laser with high-purity single-mode output and high PER enabled by suppressing mode and polarization coupling[J]. Optics & Laser Technology, 2025, 186: 112729. doi: 10.1016/j.optlastec.2025.112729
[8]	Tian Jiading, Xiao Qirong, Li Dan, et al. Tandem-pumped high-power narrow-linewidth fiber laser tunable from 1060-1090 nm[J]. Journal of Lightwave Technology, 2020, 38(6): 1461-1467. doi: 10.1109/JLT.2019.2954536
[9]	Wang Zehui, Yu Weilong, Tian Jiading, et al. 5.1 kW tandem-pumped fiber amplifier seeded by random fiber laser with high suppression of stimulated Raman scattering[J]. IEEE Journal of Quantum Electronics, 2021, 57: 6800109. doi: 10.1109/jqe.2020.3048166
[10]	Wu Hanshuo, Li Ruixian, Xiao Hu, et al. First demonstration of a bidirectional tandem-pumped high-brightness 8 kW level confined-doped fiber amplifier[J]. Journal of Lightwave Technology, 2022, 40(16): 5673-5681. doi: 10.1109/JLT.2022.3183381
[11]	肖起榕, 田佳丁, 李丹, 等. 级联泵浦高功率掺镱光纤激光器: 进展与展望[J]. 中国激光, 2021, 48: 1501004 doi: 10.3788/CJL202148.1501004 Xiao Qirong, Tian Jiading, Li Dan, et al. Tandem-pumped high-power ytterbium-doped fiber lasers: progress and opportunities[J]. Chinese Journal of Lasers, 2021, 48: 1501004 doi: 10.3788/CJL202148.1501004
[12]	肖虎, 李瑞显, 吴函烁, 等. 高功率高光束质量级联泵浦掺镱光纤激光器研究进展[J]. 光学学报, 2023, 43: 1714009 doi: 10.3788/AOS230991 Xiao Hu, Li Ruixian, Wu Hanshuo, et al. Research progress in tandem-pumped high-power and high-beam quality ytterbium-doped fiber laser[J]. Acta Optica Sinica, 2023, 43: 1714009 doi: 10.3788/AOS230991
[13]	Shiner B. The impact of fiber laser technology on the world wide material processing market[C]//CLEO: 2013. 2013: AF2J. 1.
[14]	林傲祥, 肖起榕, 倪力, 等. 国产YDF有源光纤实现单纤20 kW激光输出[J]. 中国激光, 2021, 48: 0916003 doi: 10.3772/j.issn.1009-5659.2021.13.004 Lin Aoxiang, Xiao Qirong, Ni Li, et al. Domestic YDF active fiber realizes single fiber 20 kW laser output[J]. Chinese Journal of Lasers, 2021, 48: 0916003 doi: 10.3772/j.issn.1009-5659.2021.13.004
[15]	肖虎, 潘志勇, 陈子伦, 等. 基于自研光纤和器件实现20 kW高光束质量激光稳定输出[J]. 中国激光, 2022, 49: 1616002 Xiao Hu, Pan Zhiyong, Chen Zilun, et al. Stable output of 20 kW high beam quality laser based on self-developed optical fiber and device[J]. Chinese Journal of Lasers, 2022, 49: 1616002
[16]	李峰云, 代江云, 刘念, 等. 自研光纤实现高SRS抑制21.39 kW激光输出[J]. 中国激光, 2022, 49: 2016004 Li Fengyun, Dai Jiangyun, Liu Nian, et al. Self developed fiber optic achieves high SRS suppression of 21.39 kW laser output[J]. Chinese Journal of Lasers, 2022, 49: 2016004
[17]	Xiao Hu, Leng Jinyong, Zhang Hanwei, et al. High-power 1018 nm ytterbium-doped fiber laser and its application in tandem pump[J]. Applied Optics, 2015, 54(27): 8166-8169. doi: 10.1364/AO.54.008166
[18]	Yan Ping, Wang Xuejiao, Li Dan, et al. High-power 1018 nm ytterbium-doped fiber laser with output of 805 W[J]. Optics Letters, 2017, 42(7): 1193-1196. doi: 10.1364/OL.42.001193
[19]	Yan Ping, Wang Xuejiao, Wang Zehui, et al. A 1150-W 1018-nm fiber laser bidirectional pumped by wavelength-stabilized laser diodes[J]. IEEE Journal of Selected Topics in Quantum Electronics, 2018, 24: 0902506. doi: 10.1109/jstqe.2018.2805801
[20]	Platonov N, Shkurikhin O, Fomin V, et al. High-efficient kW-level single-mode ytterbium fiber lasers in all-fiber format with diffraction-limited beam at wavelengths in 1000-1030 nm spectral range[C]//Proceedings of SPIE 11260, Fiber Lasers XVII: Technology and Systems. 2020: 1126003.
[21]	Magne S, Druetta M, Goure J P, et al. An ytterbium-doped monomode fiber laser: amplified spontaneous emission, modeling of the gain and tunability in an external cavity[J]. Journal of Luminescence, 1994, 60/61: 647-650.
[22]	卢秀权, 陈绍和. 掺镱单模石英光纤中放大的自发辐射[J]. 中国激光, 2001, 28(2): 125-129 Lu Xiuquan, Chen Shaohe. Amplified spontaneous emission in ytterbium-doped monomode silica fiber[J]. Chinese Journal of Lasers, 2001, 28(2): 125-129
[23]	Lin J H, Lin Weiting, Lin C H, et al. Experimental and theoretical study of single-mode 1018 nm ytterbium-doped fiber laser with 100 W output power[C]//Frontiers in Optics 2017. 2017: LTh3F. 6.
[24]	Lafouti M, Latifi H, Sarabi H, et al. 407 W specially-designed fiber laser at 1018 nm using a gain fiber with a low core/cladding ratio of 20/400 μm[J]. Laser Physics, 2018, 28: 115102. doi: 10.1088/1555-6611/aad92f
[25]	Tian Jiading, Xiao Qirong, Li Dan, et al. Suppressing the amplified spontaneous emission in the high-power 1018-nm monolithic fiber laser by decreasing the feedback from the inner reflections[J]. Journal of the Optical Society of America B, 2020, 37(8): 2514-2522. doi: 10.1364/JOSAB.396541
[26]	Sarabi H, Latifi H, Lafouti M, et al. High-power 1018 nm Yb³⁺ doped fiber lasers with different YDF core and coiling diameters: theoretical and experimental study[J]. Applied Optics, 2023, 62(21): 5619-5626. doi: 10.1364/AO.488252
[27]	Chen Xiaolong, Wang Jianhua, Zhao Xiang, et al. 307 W high-power 1018 nm monolithic tandem pump fiber source with effective thermal management[J]. Chinese Optics Letters, 2017, 15: 071407. doi: 10.3788/COL201715.071407
[28]	Wang Jianhua, Chen Gui, Zhang Lei, et al. High-efficiency fiber laser at 1018 nm using Yb-doped phosphosilicate fiber[J]. Applied Optics, 2012, 51(29): 7130-7133. doi: 10.1364/AO.51.007130
[29]	Palma-Vega G, Walbaum T, Heinzig M, et al. Ring-up-doped fiber for the generation of more than 600 W single-mode narrow-band output at 1018 nm[J]. Optics Letters, 2019, 44(10): 2502-2505. doi: 10.1364/OL.44.002502
[30]	Morasse B, Perron A, Faucher D, et al. Efficient 1018 nm high power fiber laser using intracavity tilted FBG ASE filters[C]//Proceedings of SPIE 12865, Fiber Lasers XXI: Technology and Systems. 2024: 1286509.
[31]	Brown D C, Hoffman H J. Thermal, stress, and thermo-optic effects in high average power double-clad silica fiber lasers[J]. IEEE Journal of Quantum Electronics, 2001, 37(2): 207-217. doi: 10.1109/3.903070
[32]	Schermer R T, Cole J H. Improved bend loss formula verified for optical fiber by simulation and experiment[J]. IEEE Journal of Quantum Electronics, 2007, 43(10): 899-909. doi: 10.1109/JQE.2007.903364
[33]	陈楠谕, 陈晓龙, 刘万生, 等. 高效率高稳定性1018 nm单纤振荡器[J]. 中国激光, 2022, 49: 1701002 doi: 10.3788/CJL202249.1701002 Chen Nanyu, Chen Xiaolong, Liu Wansheng, et al. High efficiency and stability 1018 nm single fiber oscillator[J]. Chinese Journal of Lasers, 2022, 49: 1701002 doi: 10.3788/CJL202249.1701002
[34]	Essiambre R J, Mestre M A, Ryf R, et al. Experimental investigation of inter-modal four-wave mixing in few-mode fibers[J]. IEEE Photonics Technology Letters, 2013, 25(6): 539-542. doi: 10.1109/LPT.2013.2242881