[1] [1] Lou Qihong, Zhou Jun, Zhu Jianqiang, et al.. Recent progress of high-power fiber lasers[J]. Infrared and Laser Engineering, 2006, 35(2): 135-138.

[2] [2] Luo Wei, Dong Wenfeng, Yang Huabing, et al.. Development trend of high power lasers[J]. Laser & Infrared, 2013, 43(8): 845-852.

[3] [3] Fermann M E, Hartl I. Ultrafast fibre lasers[J]. Nature Photonics, 2013, 7: 868-874.

[4] [4] Zhao Z, Dunham B M, Wise F W. Generation of 150 W average and 1 MW peak power picosecond pulses from a rod-type fiber master oscillator power amplifier[J]. J Opt Soc Am B, 2014, 31(1): 33-37.

[5] [5] Eidam T, Rothhardt J, Stutzki F, et al.. Fiber chirped-pulse amplification system emitting 3.8 GW peak power[J]. Opt Express, 2011, 19(1): 255-260.

[6] [6] Chai Lu, Hu Minglie, Fang Xiaohui, et al.. Advances in femtosecond laser technologies with photonic crystal fibers[J]. Chinese J Lasers, 2013, 40(1): 0101001.

[7] [7] Zaouter Y, Martial I, Aubry N, et al.. Direct amplification of ultrashort pulses in μ-pulling-down Yb YAG single crystal fibers[J]. Opt Lett, 2011, 36(5): 748-750.

[8] [8] Délen X, Zaouter Y, Martial I, et al.. YbYAG single crystal fiber power amplifier for femtosecond sources[J]. Opt Lett, 2013, 38(2): 109-111.

[9] [9] Zhang Zhiwei. Thin disk YbYAG laser and its applications[J]. High Power Laser and Particle Beams, 2005, 17(B04): 11-14.

[10] [10] Ding Yagian, Qi Yunfeng, Liu Yuan, et al.. Dual-wavelength fiber grating laser in linear overlapping cavity[J]. Chin Opt Lett, 2013, 11(12): 120603.

[11] [11] Victor Khitrov, Bryce Samson, David Machewirth, et al.. 242 W single-mode CW fiber laser operating at 1030 nm lasing wavelength and with 0.35 nm spectral width[C]. Advanced Solid-State Photonics, 2006, WD5.

[12] [12] Li Wenxue, Hao Qiang, Yan Ming, et al.. Tunable flat-top nanosecond fiber laser oscillator and 280 W average power nanosecond Yb-doped fiber amplifier[J]. Opt Express, 2009, 17(12): 10113-10118.

[13] [13] Zhou Cuiyun, Liu Yuan, Du Songtao, et al.. 1030 nm High repetition rate nanosecond pulse all fiber amplifier[J]. Chinese J Lasers, 2011, 38(8): 0802010.

[14] [14] Wang Pu, Liu Jiang. Progress and prospect on ultrafast Tm-doped fiber lasers at 2 μm wavelength[J]. Chinese J Lasers, 2013, 40(6): 0601002.

[15] [15] Jin Dongchen, Sun Ruoyu, Shi Hongxing, et al.. Stable passively Q-switched and gain-switched Yb-doped all-fiber laser based on a dual-cavity with fiber Bragg gratings[J]. Opt Express, 2013, 21(22): 26027-26033.

[16] [16] Stolen R H, Lin C. Self-phase-modulation in silica optical fibers[J]. Phys Rev A, 1978, 17(4): 1448.

[17] [17] Kelson I, Hardy A. Optimization of strongly pumped fiber lasers[J]. J Lightwave Technol, 1999, 17(5): 891-897.