[1] D J Richardson, J Nilsson, W A Clarkson. High power fiber lasers: Current status and future perspectives [Invited]. Journal of the Optical Society of America B, 27, B63(2010).
[2] Michalis N Zervas, Christophe A Codemard. High power fiber lasers: A review. IEEE Journal of Selected Topics in Quantum Electronics, 20, 219-241(2014).
[3] Fabian Stutzki, Florian Jansen, Hans-Jürgen Otto, et al. Designing advanced very-large-mode-area fibers for power scaling of fiber-laser systems. Optica, 1, 233(2014).
[4] Zeng Lingfa, Xiaoming Xi, Yun Ye. Near-single-mode 3 kW monolithic fiber oscillator based on a longitudinally spindle-shaped Yb-doped fiber. Optics Express, 45, 5792-5795(2020).
[5] Xi Xiaoming, Wang Peng, Yang Baolai, et al. The output power of the all-fiber laser oscillator exceeds 7 kW. Chinese Journal of Lasers, 48, 0116001(2021).
[6] Wang Y, Kitahara R, Kiyoyama W, et al. 8kW singlestage allfiber Ybdoped fiber laser with a BPP of 0.50 mmmrad[C]Proc of SPIE, 2020, 11260: 1126022.
[7] Pengfei Ma, Hu Xiao, Jinyong Leng, et al. Narrow linewidth fiber laser breaks through 4 kW near single mode output. Infrared and Laser Engineering, 50, 20200421(2021).
[8] Pengfei Ma, Yanxin Ma, Rongtao Su, et al. Coherent synthesis of 8 kW fiber laser with high quality and high efficiency (brief news). Infrared and Laser Engineering, 49, 20200577(2020).
[9] Christian Wirth, Thomas Schreiber, Miroslaw Rekas, et al. Highpower linearpolarized narrow linewidth photonic crystal fiber amplifier[C]Proc of SPIE, 2010, 7580: 75801H.
[10] Rumao Tao, Rongtao Su, Pengfei Ma, et al. Suppressing mode instabilities by optimizing the fiber coiling methods. Laser Physics Letters, 14, 25101(2017).
[11] Yun Ye, Xiaoming Xi, Chen Shi, et al. Comparative study on transverse mode instability of fiber amplifiers based on long tapered fiber and conventional uniform fiber. Laser Physics Letters, 16, 85109(2019).
[12] Aoxiang Lin, Huan Zhan, Kun Peng, et al. 10 kW-level pump-gain integrated functional laser fiber. High Power Laser and Particle Beams, 30, 180110(2018).
[13] Jianjun Wang, Yu Liu, Min Li, et al. Ten-year review and prospect on mode instability research of fiber lasers. High Power Laser and Particle Beams, 32, 121003(2020).
[14] Wang Xiaolin, Lv Pin, Zhang Hanwei, et al. Fiber laser simulation software see fiber laser and fiber laser tool collection SFTool. Chinese Journal of Lasers, 44, 0506002(2017).
[15] A V Smith, J J Smith. Steady-periodic method for modeling mode instability in fiber amplifiers. Optics Express, 21, 2606-2623(2013).
[16] Xiaolin Wang, Hanwei Zhang, Baolai Yang, et al. High-power ytterbium-doped fiber laser oscillator current situation and future developments. Chinese Journal of Lasers, 48, 401001(2021).
[17] Baolai Yang, Hanwei Zhang, Xiaolin Wang, et al. Mitigating transverse mode instability in a single-end pumped all-fiber laser oscillator with a scaling power of up to 2 kW. Journal of Optics, 18, 105803(2016).
[18] Xuewen Li, Chunlei Yu, Hui Shen, et al. Thermo-optic effect and mode instability threshold characteristics of high-power fiber laser. Chinese Journal of Lasers, 46, 1001001(2019).
[19] T Eidam, C Wirth, C Jauregui, et al. Experimental observations of the threshold-like onset of mode instabilities in high power fiber amplifiers. Optics Express, 19, 13218-13224(2011).
[20] Nicoletta Haarlammert, Vries Oliver de, Andreas Liem, et al. Build up and decay of mode instability in a high power fiber amplifier. Optics Express, 20, 13274-13283(2012).
[21] R Tao, P Ma, X Wang, et al. Mitigating of modal instabilities in linearly-polarized fiber amplifiers by shifting pump wavelength. Journal of Optics, 17, 45504(2015).
[22] R Tao, X Wang, P Zhou. Comprehensive theoretical study of mode instability in high-power fiber lasers by employing a universal model and its implications. IEEE Journal of Selected Topics in Quantum Electronics, 24, 1-19(2018).
