[1] 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(2010).

[2] Nilsson J, Ramachandran S, Shay T M et al. Introduction to the issue on high-power fiber lasers[J]. IEEE Journal of Selected Topics in Quantum Electronics, 15, 1-2(2009).

[3] Jauregui C, Limpert J, Tünnermann A. High-power fibre lasers[J]. Nature Photonics, 7, 861-867(2013).

[4] Samson B, Carter A. Recent progress on power scaling narrow linewidth fiber amplifiers and their applications[J]. The Review of Laser Engineering, 41, 714-717(2013).

[5] Carlson C G, Dragic P D, Price R K et al. A narrow-linewidth, Yb fiber-amplifier-based upper atmospheric Doppler temperature lidar[J]. IEEE Journal of Selected Topics in Quantum Electronics, 15, 451-461(2009).

[6] Shi W, Leigh M A, Zong J et al. High-power all-fiber-based narrow-linewidth single-mode fiber laser pulses in the C-band and frequency conversion to THz generation[J]. IEEE Journal of Selected Topics in Quantum Electronics, 15, 377-384(2009).

[7] Jeong Y, Nilsson J, Sahu J K et al. Power scaling of single-frequency ytterbium-doped fiber master-oscillator power-amplifier sources up to 500 W[J]. IEEE Journal of Selected Topics in Quantum Electronics, 13, 546-551(2007).

[8] Huang L, Wu H S, Li R X et al. 414 W near-diffraction-limited all-fiberized single-frequency polarization-maintained fiber amplifier[J]. Optics Letters, 42, 1(2017).

[9] Dajani I, Angel F, Holten R et al. Multi-kilowatt power scaling and coherent beam combining of narrow-linewidth fiber lasers[J]. Proceedings of SPIE, 9728, 972801(2016).

[10] Yu C X, Shatrovoy O, Fan T Y et al. Diode-pumped narrow linewidth multi-kilowatt metalized Yb fiber amplifier[J]. Optics Letters, 41, 5202-5205(2016).

[11] Beier F, Hupel C, Kuhn S et al. Single mode 4.3 kW output power from a diode-pumped Yb-doped fiber amplifier[J]. Optics Express, 25, 14892-14899(2017).

[12] Wang Y S, Ma Y, Sun Y H et al. 2.62-kW, 30-GHz linearly polarized all-fiber laser with narrow linewidth and near-diffraction-limit beam quality[J]. Chinese Journal of Lasers, 46, 1215001(2019).

[13] Kobyakov A, Sauer M, Chowdhury D. Stimulated Brillouin scattering in optical fibers[J]. Advances in Optics and Photonics, 2, 1-59(2010).

[14] Agrawal G P[M]. Nonlinear fiber optics: fifth edition, 1-629(2015).

[15] Dawson J W, Messerly M J, Beach R J et al. Analysis of the scalability of diffraction-limited fiber lasers and amplifiers to high average power[J]. Optics Express, 16, 13240-13266(2008).

[16] Gray S, Liu A P, Walton D T et al. 502 Watt, single transverse mode, narrow linewidth, bidirectionally pumped Yb-doped fiber amplifier[J]. Optics Express, 15, 17044(2007).

[17] Pulford B, Ehrenreich T, Holten R et al. 400-W near diffraction-limited single-frequency all-solid photonic bandgap fiber amplifier[J]. Optics Letters, 40, 2297(2015).

[18] Harish A V, Nilsson J. Optimization of phase modulation formats for suppression of stimulated Brillouin scattering in optical fibers[J]. IEEE Journal of Selected Topics in Quantum Electronics, 24, 1-10(2018).

[19] Liu A P. Stimulated Brillouin scattering in single-frequency fiber amplifiers with delivery fibers[J]. Optics Express, 17, 15201-15209(2009).

[20] Zhang L, Cui S Z, Liu C et al. 170 W, single-frequency, single-mode, linearly-polarized, Yb-doped all-fiber amplifier[J]. Optics Express, 21, 5456-5462(2013).

[21] Robin C, Dajani I. Acoustically segmented photonic crystal fiber for single-frequency high-power laser applications[J]. Optics Letters, 36, 2641-2643(2011).

[22] Liu C, Liu J, Zhang Y J et al. Stimulated Brillouin scattering suppression of thulium-doped fiber amplifier with fiber superfluorescent seed source[J]. Optics Express, 25, 9569-9578(2017).

[23] Naderi N A, Flores A, Anderson B M et al. Beam combinable, kilowatt, all-fiber amplifier based on phase-modulated laser gain competition[J]. Optics Letters, 41, 3964-3967(2016).

[24] Erdogan T. Cladding-mode resonances in short- and long-period fiber grating filters[J]. Journal of the Optical Society of America A, 14, 1760-1773(1997).