[1] Limpert J, Roser F, Klingebiel S et al. The rising power of fiber lasers and amplifiers[J]. IEEE Journal of Selected Topics in Quantum Electronics, 13, 537-545(2007).

[2] Richardson D J, Nilsson J, Clarkson W A. High power fiber lasers: current status and future perspectives[Invited][J]. Journal of the Optical Society of America B, 27, B63-B92(2010).

[3] Zervas M N, Codemard C A. High power fiber lasers: a review[J]. IEEE Journal of Selected Topics in Quantum Electronics, 20, 219-241(2014).

[4] Stark M. Over 50 percent wall-plug efficiency fiber laser[J]. Laser Technik Journal, 13, 14-16(2016).

[5] Chen X L, Lou F G, He Y et al. Home-made 10 kW fiber laser with high efficiency[J]. Acta Optica Sinica, 39, 0336001(2019).

[6] Chen W, Yang H L, Guo X Q et al. The research status and challenge of space radiation physics and application[J]. Chinese Science Bulletin, 62, 978-989(2017).

[7] Girard S, Kuhnhenn J, Gusarov A et al. Radiation effects on silica-based optical fibers: recent advances and future challenges[J]. IEEE Transactions on Nuclear Science, 60, 2015-2036(2013).

[8] Huang H Q, Zhao N, Chen G et al. Effects of γ-radiation on Yb-doped fiber[J]. Acta Physica Sinica, 63, 200201(2014).

[9] Xing Y B, Huang H Q, Zhao N et al. Pump bleaching of Tm-doped fiber with 793 nm pump source[J]. Optics Letters, 40, 681-684(2015).

[10] Chi J J, Jiang S Q, Zhang L et al. Experimental study on radiation performance of fiber lasers[J]. Laser & Optoelectronics Progress, 55, 061406(2018).

[11] Wu W D, Yu T, Tao M M et al. Experimental investigation of gamma-ray irradiation effect on Tm-doped fibers[J]. Chinese Optics, 11, 610-614(2018).

[12] Chen H W, Tao M M, Zhao H C et al. Experimental investigations on laser power characteristics influenced by gamma-ray irradiated gain fiber[J]. Chinese Journal of Lasers, 46, 1201005(2019).

[13] Shi C, Tao R M, Wang X L et al. New progress and phenomena of modal instability in fiber lasers[J]. Chinese Journal of Lasers, 44, 0201004(2017).

[14] Li X W, Yu C L, Shen H et al. Thermo-optic effect and mode instability threshold characteristics of high-power fiber laser[J]. Chinese Journal of Lasers, 46, 1101001(2019).

[15] Hu Z T, He B, Zhou J et al. Research progress in thermal effect of high power fiber lasers[J]. Laser & Optoelectronics Progress, 53, 080002(2016).

[16] Yang W Q, Hou J, Song R et al. Theoretical analysis of two-stage pumping technology for high power fiber lasers[J]. Acta Physica Sinica, 60, 084210(2011).

[17] Lezius M, Predehl K, Stower W et al. Radiation induced absorption in rare earth doped optical fibers[J]. IEEE Transactions on Nuclear Science, 59, 425-433(2012).

[18] Luo Y, Wang X L, Zhang H W et al. Amplified spontaneous emission characteristics and locations of high temperature vulnerable point in fiber amplifiers[J]. Acta Physica Sinica, 66, 234206(2017).

[19] Girard S, Marcandella C, Morana A et al. Combined high dose and temperature radiation effects on multimode silica-based optical fibers[J]. IEEE Transactions on Nuclear Science, 60, 4305-4313(2013).