[1] J W Nicholson, A Desantolo, M Yan, et al. High energy, 1572.3 nm pulses for CO₂ LIDAR from a polarization-maintaining, very-large-mode-area, Er-doped fiber amplifier. Optics Express, 24, 19961-19968(2016).

[2] Fu Shijie, Shi Wei, Feng Yan, et al. Review of recent progress on single-frequency fiber lasers. Journal of the Optical Society of America B, 34, A49-A62(2017).

[3] P Ma, Z Pu, Y Ma, et al. Coherent polarization beam combining of eight fiber lasers using single-frequency dithering technique. Applied Physics B, 109, 269-275(2012).

[4] Dong Zhi, Yanxing Ma, Pengfei Ma, et al. Efficient coherent beam combining of fiber laser array through km-scale turbulent atmosphere. Infrared and Laser Engineering, 48, 1005007(2019).

[5] Xue Cheng, Jianli Wang, Changhua Liu. Beam combining of high energy fibre lasers. Infrared and Laser Engineering, 47, 0103011(2018).

[6] J J Du, W F Li, G Li, et al. Intensity noise suppression of light field by optoelectronic feedback. Optik International Journal for Light & Electron Optics, 124, 3443-3445(2013).

[7] [7] Numata K, Yu A W, Camp J B, et al. Laser system development f gravitationalwave interferometry in space[C]Proc of SPIE, 2018, 10511: 105111D.

[8] R P Scott, C Langrock, B H Kolner. High-dynamic-range laser amplitude and phase noise measurement techniques. IEEE Journal of Selected Topics in Quantum Electronics, 7, 641-655(2002).

[9] P Horak, N Y Voo, M Ibsen, et al. Pump-noise-induced linewidth contributions in distributed feedback fiber lasers. IEEE Photonics Technology Letters, 18, 998-1000(2006).

[10] S B Foster, A E Tikhomirov. Pump-noise contribution to frequency noise and linewidth of distributed-feedback fiber lasers. IEEE Journal of Quantum Electronics, 46, 734-741(2010).

[11] Q Zhao, Y Zhang, L Wei, et al. Frequency noise of distributed Bragg reflector single-frequency fiber laser. Optics Express, 25, 12601-12610(2017).

[12] Zhiyuan Wang, Chao Chen, Xiaonan Shan, et al. Simulation of noise characteristics of fiber grating external cavity lasers. Laser & Optoelectronics Progress, 54, 011401(2017).

[13] L Ma, Z Hu, X Liang, et al. Relaxation oscillation in Er³⁺-doped and Yb³⁺/Er³⁺ co-doped fiber grating lasers. Applied Optics, 49, 1979-1985(2010).

[14] C Li, S H Xu, C S Yang, et al. Frequency noise of high-gain phosphate fiber single-frequency laser. Laser Physics, 23, 45107(2013).

[15] Y Li, Z Fu, L Zhu, et al. Laser frequency noise measurement using an envelope-ratio method based on a delayed self-heterodyne interferometer. Optics Communications, 435, 244-250(2018).

[16] L B Mercer. 1/f frequency noise effects on self-heterodyne linewidth measurements. Journal of Lightwave Technology, 9, 485-493(1991).

[17] X Tao, J Li, H Q Zhang, et al. Integrable aspects and applications of a generalized inhomogeneous N-coupled nonlinear Schrdinger system in plasmas and optical fibers via symbolic computation. Physics Letters A, 372, 1990-2001(2008).

[18] E Ronnekleiv. Frequency and intensity noise of single frequency fiber Bragg grating lasers. Optical Fiber Technology, 7, 206-235(2001).

[19] W Lee, J Geng, S Jiang, et al. 1.8 mJ, 3.5 kW single-frequency optical pulses at 1572 nm generated from an all-fiber MOPA system. Optics Letters, 43, 2264-2267(2018).

[20] W J Yue, Y X Wang, C D Xiong, et al. Intensity noise of erbium-doped fiber laser based on full quantum theory. Josa B, 30, 275-281(2013).