[1] [1] Humbach O, Fabian H, Grzesik U, et al. Analysis of OH absorption bands in synthetic silica[J]. Journal of Non-Crystalline Solids, 1996, 203(none): 19-26.

[2] [2] Barria J B, Mammez D, Cadiou E, et al. Multispecies high-energy emitter for CO2, CH4, and H2O monitoring in the 2 m range[J]. Optics Letters, 2014, 39(23): 6719-6722.

[3] [3] Bekman H H P T, Heuvel J C V D, Putten F J M V, et al. Development of a mid-infrared laser for study of infrared countermeasures techniques[J]. Proceedings of SPIE-the International Society for Optical Engineering, 2004, 5615: 27-38.

[4] [4] Ludwig H C, Kruschat T, Knobloch T, et al. First experiences with a 2.0 m near infrared laser system for neuroendoscopy[J]. Neurosurgical Review, 2007, 30(3): 195.

[5] [5] Simakov N, Davidson A, Hemming A, et al. Mid-infrared generation in ZnGeP2 pumped by a monolithic, power scalable 2 m source[J]. Proc.of SPIE, 2012, 8237: 82373k.

[6] [6] Nelson L E, Jones D J, Tamura K, et al. Ultrashort-pulse fiber ring lasers[J]. Applied Physics B: Lasers and Optics, 1997, 65(2): 277-294.

[7] [7] Tamura K, Ippen E P, Haus H A, et al.77 fs pulse generation from a stretched-pulse mode-locked all-fiber ring laser[J]. Optics Letters, 1993, 18(13): 1080-1082.

[8] [8] Ruehl A, Kuhn V, Wandt D, et al. Normal dispersion erbium-doped fiber laser with pulse energies above 10 nJ[J]. Optics Express, 2008, 16(5): 3130-3135.

[9] [9] Fermann M E, Kruglov V I, Thomsen B C, et al. Self-similar propagation and amplification of parabolic pulses in optical fibers[J]. Physical Review Letters, 2000, 84(26): 6010-6013.

[10] [10] Lefrancois S, Liu C H, Stock M L, et al. High-energy similariton fiber laser using chirally coupled core fiber[J]. Optics Letters, 2013, 38(1): 43-45.

[11] [11] Chong A, Buckley J, Renninger W, et al. All-normal-dispersion femtosecond fiber laser[J]. Optics Express, 2006, 14(21): 10095-10100.

[12] [12] Lefranois S, Kieu K, Deng Y, et al. Scaling of dissipative soliton fiber lasers to megawatt peak powers by use of large-area photonic crystal fiber[J]. Optics Letters, 2010, 35(10): 1569-1571.

[13] [13] Ding E, Grelu P, Kutz J N. Dissipative soliton resonance in a passively mode-locked fiber laser[J]. Optics Letters, 2011, 36(7): 1146-1148.

[14] [14] Song Y F, Zhang H, Zhao L M, et al. Coexistence and interaction of vector and bound vector solitons in a dispersion-managed fiber laser mode locked by graphene[J]. Optics Express, 2016, 24(2): 1814-1822.

[15] [15] Li X L, Zhang S M, Meng Y C, et al. Harmonic mode locking counterparts of dark pulse and dark-bright pulse pairs[J]. Optics Express, 2013, 21(7): 8409-8416.

[16] [16] Zhao J Q, Zhou J, Li L, et al. Narrow-bandwidth h-shaped pulse generation and evolution in a net normal dispersion thulium-doped fiber laser[J]. Optics Express, 2019, 27(21): 29770-29780.

[17] [17] Zheng Z J, Ren X K, Zhu K, et al. Fundamental and harmonic mode-locked h-shaped pulse generation using a figure-of-9 thulium-doped fiber laser[J]. Optics Express, 2019, 27(26): 37172-37179.

[18] [18] He Z W, Chen Y, Deng Z X, et al. H-shaped pulse generation with tunable leading edge from a Tm-doped mode-locked fiber laser[J]. Applied Physics Express, 2020, 13(1): 12011-12016.

[19] [19] Mao D, Liu X M, Wang L R, et al. Dual-wavelength step-like pulses in an ultra-large negative-dispersion fiber laser[J]. Optics Express, 2011, 19(5): 3996-4001.

[20] [20] Dong Z P, Lin J Q, Li H X, et al. Generation of mode-locked square-shaped and chair-like pulse based on reverse saturable absorption effect of nonlinear multimode interference[J]. Optics Express, 2019, 27(20): 27610-27617.

[21] [21] Gupta P K, Singh C P, Singh A, et al. Chair-like pulses in an all-normal dispersion Ytterbium-doped mode-locked fiber laser[J]. Applied Optics, 2016, 55(35): 9961-9967.

[22] [22] Semaan G, Komarov A, Niang A, et al. Spectral dynamics of square pulses in passively mode-locked fiber lasers[J]. Physical Review. A, 2018, 97(2): 23812.1-23812.5.

[23] [23] Semaan G, Komarov A, Niang A, et al. Theoretical and experimental analysis of staircase pulses in passive mode-locked fiber lasers[J]. Physical Review A, 2018, 98(3): 33819.1-33819.7.