[1] Jackson S D. Towards high-power mid-infrared emission from a fibre laser[J]. Nature Photonics, 6, 423-431(2012).

[2] Henderson S W, Suni P J M, Hale C P et al. Coherent laser radar at 2 µm using solid-state lasers[J]. IEEE Transactions on Geoscience and Remote Sensing, 31, 4-15(1993).

[3] Ma P F, Chang H X, Ma Y X et al. 7.1 kW coherent beam combining system based on a seven-channel fiber amplifier array[J]. Optics & Laser Technology, 140, 107016(2021).

[4] Abadie J, Abbott B P, Abbott R et al. A gravitational wave observatory operating beyond the quantum shot-noise limit[J]. Nature Physics, 7, 962-965(2011).

[5] 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, 17044-17050(2007).

[6] Valero N, Feral C, Lhermite J et al. 39 W narrow spectral linewidth monolithic ytterbium-doped fiber MOPA system operating at 976 nm[J]. Optics Letters, 45, 1495-1498(2020).

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

[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, 1-4(2017).

[9] Dixneuf C, Guiraud G, Bardin Y V et al. Ultra-low intensity noise, all fiber 365 W linearly polarized single frequency laser at 1064 nm[J]. Optics Express, 28, 10960-10969(2020).

[10] Jeong Y, Nilsson J, Sahu J K et al. Single-frequency, single-mode, plane-polarized ytterbium-doped fiber master oscillator power amplifier source with 264 W of output power[J]. Optics Letters, 30, 459-461(2005).

[11] Liu Y F, Lü Z W, Dong Y K et al. Research on stimulated Brillouin scattering suppression based on multi-frequency phase modulation[J]. Chinese Optics Letters, 7, 29-31(2009).

[12] Lai W C, Ma P F, Song J X et al. Kilowatt-level, narrow linewidth, polarization-maintained all-fiber amplifiers based on multi-phase coded signal modulation and laser gain competition[J]. Results in Physics, 31, 105050(2021).

[13] Shi M Y, Wu Y, Li J et al. Research progress of high-power narrow-linewidth lasers based on spectral broadening[J]. Laser & Optoelectronics Progress, 60, 1500001(2023).

[14] Flores A, Robin C, Lanari A et al. Pseudo-random binary sequence phase modulation for narrow linewidth, kilowatt, monolithic fiber amplifiers[J]. Optics Express, 22, 17735-17744(2014).

[15] Panbiharwala Y, Harish A V, Feng Y J et al. Stimulated Brillouin scattering mitigation using optimized phase modulation waveforms in high power narrow linewidth Yb-doped fiber amplifiers[J]. Optics Express, 29, 17183-17200(2021).

[16] Wang H, Yang Y F, Ren Y K et al. Theoretical study of filtered and amplified PRBS phase modulation for SBS suppression in a 2.5 kW, 10 GHz monolithic fiber amplifier[J]. Optics Express, 32, 7090-7104(2024).

[17] Li W, Ma P F, Deng Y et al. All-fiber single-frequency near-single-mode laser breaks through kilowatt output for the first time[J]. Chinese Journal of Lasers, 51, 0716002(2024).

[18] Moulton P F. High power Tm: silica fiber lasers: current status, prospects and challenges[C](2011).

[19] Ehrenreich T, Leveille R, Majid Iet al. 1 kW, all-glass Tm∶fiber lasers[J]. Proceedings of SPIE, 7850, 785016(2010).

[20] Gaida C, Gebhardt M, Heuermann T et al. Ultrafast thulium fiber laser system emitting more than 1 kW of average power[J]. Optics Letters, 43, 5853-5856(2018).

[21] Ren C Y, Shen Y Q, Zheng Y H et al. Widely-tunable all-fiber Tm doped MOPA with >1 kW of output power[J]. Optics Express, 31, 22733-22739(2023).

[22] Goodno G D, Book L D, Rothenberg J E. Low-phase-noise, single-frequency, single-mode 608 W thulium fiber amplifier[J]. Optics Letters, 34, 1204-1206(2009).

[23] Liu J, Shi H X, Liu K et al. 210 W single-frequency, single-polarization, thulium-doped all-fiber MOPA[J]. Optics Express, 22, 13572-13578(2014).

[24] Wang X, Jin X X, Wu W J et al. 310-W single frequency Tm-doped all-fiber MOPA[J]. IEEE Photonics Technology Letters, 27, 677-680(2015).

[25] Guan X C, Yang C S, Gu Q et al. 55 W kilohertz-linewidth core- and in-band-pumped linearly polarized single-frequency fiber laser at 1950 nm[J]. Optics Letters, 45, 2343-2346(2020).

[26] Guan X C, Yang C S, Gu Q et al. 316 W high-brightness narrow-linewidth linearly-polarized all-fiber single-frequency laser at 1950 nm[J]. Applied Physics Express, 14, 112004(2021).

[27] Anderson B M, Solomon J, Flores A. 1.1 kW, beam combinable thulium doped all-fiber amplifier[J]. Proceedings of SPIE, 11665, 116650B(2021).

[28] Liu M Z, Yang Y F, Shen H et al. 1.27 kW, 2.2 GHz pseudo-random binary sequence phase modulated fiber amplifier with Brillouin gain-spectrum overlap[J]. Scientific Reports, 10, 629(2020).

[29] Zeringue C, Dajani I, Naderi S et al. A theoretical study of transient stimulated Brillouin scattering in optical fibers seeded with phase-modulated light[J]. Optics Express, 20, 21196-21213(2012).

[30] Zhou J, He B, Qi Y F et al. High-power fiber laser technology[J]. Chinese Journal of Lasers, 51, 1101021(2024).