2 μm ultra-narrow linewidth fiber laser achieves 1 kW near-diffraction-limited output

Liu Hang; Wang Hongyu; Wang Jiawei; Yu Yang; Zhang Qianwen; Feng Yujun; Sun Yinhong; Xu Shanhui; Lu Yanhua; Tang Chun

doi:10.11884/HPLPB202436.240171

Volume 36 Issue 7

May 2024

Turn off MathJax

Article Contents

Article Navigation > High Power Laser and Particle Beams > 2024 > 36(7): 071001

Liu Hang, Wang Hongyu, Wang Jiawei, et al. 2 μm ultra-narrow linewidth fiber laser achieves 1 kW near-diffraction-limited output[J]. High Power Laser and Particle Beams, 2024, 36: 071001. doi: 10.11884/HPLPB202436.240171

Citation:

Liu Hang, Wang Hongyu, Wang Jiawei, et al. 2 μm ultra-narrow linewidth fiber laser achieves 1 kW near-diffraction-limited output[J]. High Power Laser and Particle Beams, 2024, 36: 071001. doi: 10.11884/HPLPB202436.240171

Citation:

PDF( 2804 KB)

2 μm ultra-narrow linewidth fiber laser achieves 1 kW near-diffraction-limited output

doi: 10.11884/HPLPB202436.240171

Liu Hang^{1, 2
,},
Wang Hongyu³,
Wang Jiawei^{1, 2},
Yu Yang⁴,
Zhang Qianwen^{1, 2, 5},
Feng Yujun^{1, 2
,
,},
Sun Yinhong^{1, 2
,
,},
Xu Shanhui³,
Lu Yanhua^{1, 2},
Tang Chun^{1, 2}

1.
Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, China
2.
National Key Laboratory of Advanced Lasers and High Power Microwaves, Mianyang 621900, China
3.
Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510600, China
4.
Mianyang Office of the Military Representative Bureau, Equipment Department of Military Aerospace Forces, Mianyang 621000, China
5.
Graduate School of China Academy of Engineering Physics, Beijing 100088, China

Received Date: 2024-05-17
Accepted Date: 2024-05-31
Rev Recd Date: 2024-05-31

Available Online: 2024-05-31

Publish Date: 2024-05-31

Abstract

Abstract

Fiber lasers in the 2 μm band are widely applicated in biomedicine, environmental monitoring, nonlinear frequency conversion, as well as in laser radar and laser communications. However, the power scaling of lasers in this band are limited by low quantum efficiency, high thermal loading, and several nonlinear effect. In this study, we propose a higher-order phase modulation technique based on inverted probability tuning sequences to suppress the SBS effect, a signal laser time-domain stabilization control technique with multi-stage link auto-feedback to enhance the SRS threshold, and a fiber-based transverse-mode purification technique to control the beam quality. Finally, a two-stage main amplification structure is used to achieve an ultra-narrow linewidth near-diffraction-limited output of 1 kW at 1 950 nm, with an optical-to-optical conversion efficiency of 55.6%, linewidth of 3.8 GHz, beam quality M² factor of about 1.2, and no transversemode instability effect.
- fiber laser,
- MOPA amplification,
- thulium-doped fiber laser,
- mode instability,
- quantum loss

FullText(HTML)

References(8)

References

[1]	张秀娟, 段云锋, 赵水, 等. 高效率1018nm全光纤激光器实验研究[J]. 光学学报, 2016, 36:0414002 doi: 10.3788/AOS201636.0414002 Zhang Xiujuan, Duan Yunfeng, Zhao Shui, et al. Experimental study on high efficient all-fiber lasers at 1018 nm[J]. Acta Optica Sinica, 2016, 36: 0414002 doi: 10.3788/AOS201636.0414002
[2]	Christensen S, Frith G, Samson B. Developments in thulium-doped fiber lasers offer higher powers[C]//Proceedings of the 21st Annual Meeting of the LEOS, IEEE Lasers and Electro-Optics Society. 2008.
[3]	刘江, 刘昆, 谭方舟, 等. 百瓦级全光纤掺铥光纤激光器及超荧光光源[J]. 中国激光, 2014, 41:0402005 doi: 10.3788/CJL201441.0402005 Liu Jiang, Liu Kun, Tan Fangzhou, et al. Hundred-watt-level all-fiber thulium-doped fiber laser and superfluorescent source[J]. Chinese Journal of Lasers, 2014, 41: 0402005 doi: 10.3788/CJL201441.0402005
[4]	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
[5]	胡志涛, 何兵, 周军, 等. 高功率光纤激光器热效应的研究进展[J]. 激光与光电子学进展, 2016, 53:080002 Hu Zhitao, He Bing, Zhou Jun, et al. Research progress in thermal effect of high power fiber lasers[J]. Laser & Optoelectronics Progress, 2016, 53: 080002
[6]	张璇. 大功率掺铥光纤激光器中非线性效应及横模不稳定性研究[D]. 北京: 北京交通大学, 2021 Zhang Xuan. Study on nonlinear effect and transverse mode instability in high power thulium-doped fiber laser[D]. Beijing: Beijing Jiaotong University, 2021
[7]	Bowers M S, Luzod N M. Stimulated Brillouin scattering in optical fibers with end reflections excited by broadband pump waves[J]. Optical Engineering, 2019, 58: 102702.
[8]	Yang Yifeng, Li Binglin, Liu Meizhong, et al. Optimization and visualization of phase modulation with filtered and amplified maximal-length sequence for SBS suppression in a short fiber system: a theoretical treatment[J]. Optics Express, 2021, 29(11): 16781-16803. doi: 10.1364/OE.426070