[1] FERMANN M E, HARTL I. Erratum: ultrafast fibre lasers[J]. Nature Photonics, 7, 1006(2013).

[2] NISHIZAWA N. Ultrashort pulse fiber lasers and their applications[J]. Japanese Journal of Applied Physics, 53, 090101(2014).

[3] CHANG G Q, WEI Z Y. Ultrafast fiber lasers: an expanding versatile toolbox[J]. iScience, 23, 101101(2020).

[4] GAO B, ZHANG R H, HUO J Y et al. Generation and categories of solitons in various mode-locked fiber lasers[J]. Optik, 220, 165168(2020).

[5] HAN Y, GUO Y B, GAO B et al. Generation, optimization, and application of ultrashort femtosecond pulse in mode-locked fiber lasers[J]. Progress in Quantum Electronics, 71, 100264(2020).

[6] SUBRAMANIAN K, GABAY I, FERHANOĞLU O et al. Kagome fiber based ultrafast laser microsurgery probe delivering micro-Joule pulse energies[J]. Biomedi-cal Optics Express, 7, 4639-4653(2016).

[7] KALAYCIOGLU H, ELAHI P, AKCAALAN O et al. High-repetition-rate ultrafast fiber lasers for material processing[J]. IEEE Journal of Selected Topics in Quantum Electronics, 24, 1-12(2018).

[8] JIA Qingsong, WANG Tianshu, WANG Zhen et al. Temperature sensing characteristics based on multi-wavelength Brillouin fiber laser[J]. Journal of Applied Optics, 39, 585-589(2018).

[9] KIEU K, WISE F W. All-fiber normal-dispersion femtosecond laser[J]. Optics Express, 16, 11453-11458(2008).

[10] BRUNTON S L, FU X, KUTZ J N. Extremum-seeking control of a mode-locked laser[J]. IEEE Journal of Quantum Electronics, 49, 852-861(2013).

[11] ZHOU L, LIU Y, XIE G H et al. Generation of stretched pulses from an all-polarization-maintaining Er-doped mode-locked fiber laser using nonlinear polarization evolu-tion[J]. Applied Physics Express, 12, 052017(2019).

[12] ZHANG W C, LIU Y, WANG C et al. Ultrafast PM fiber ring laser mode-locked by nonlinear polarization evolution with short NPE section segments[J]. Optics Express, 26, 7934-7941(2018).

[13] ZHOU Jiaqi, PAN Weiwei, ZHANG Lei et al. Research advances in mode-locked fiber lasers based on nonlinear loop mirror[J]. Chinese Journal of Lasers, 46, 0508013(2019).

[14] TAVERNER D, RICHARDSON D J, PAYNE D N. Polarisation maintaining figure-8 laser[C](1993).

[15] GUO Z R, HAO Q, PENG J S et al. Environmentally stable Er-fiber mode-locked pulse generation and amplification by spectrally filtered and phase-biased nonlinear amplifying long-loop mirror[J]. High Power Laser Science and Engineering, 7, e47(2019).

[16] XIONG S P, LUO D P, LIU Y et al. Investigation of stable pulse mode-locking regimes in a NALM figure-9 Er-doped fiber laser[J]. Optics Express, 31, 514-527(2023).

[17] KUSE N, JIANG J, LEE C C et al. All polarization-maintaining Er fiber-based optical frequency combs with nonlinear amplifying loop mirror[J]. Optics Express, 24, 3095-3102(2016).

[18] HÄNSEL W, HOOGLAND H, GIUNTA M et al. All polarization-maintaining fiber laser architecture for robust femtosecond pulse generation[J]. Applied Physics B, 123, 41(2017).

[19] LIU X Y, LIU G Y, ZHOU R L et al. An all polarization-maintaining fiber laser mode locked by nonlinear amplifying loop mirror with different biases[J]. Laser Physics, 30, 085104(2020).

[20] ZHOU J Q, PAN W W, FU X H et al. Environmentally-stable 50-fs pulse generation directly from an Er: fiber oscillator[J]. Optical Fiber Technology, 52, 101963(2019).

[21] HU Q Y, YANG K J, LI M et al. Multi-pulse dynamic patterns in a mode-locked erbium-doped fiber laser based on an Sb2S3-PVA saturable absorber[J]. Nanotechnology, 34, 365203(2023).

[22] WEN Z R, WANG K L, CHEN H W et al. Stable-, period-N- and multiple-soliton regimes in a mode-locked fiber laser with inconsistently filtered central wavelengths[J]. Optics Express, 28, 28033-28044(2020).

[23] WU C H, YAO Y, YANG Y et al. Wavelength-switchable and multi-pulse bound state based on a hybrid mode-locked mechanism[J]. Optics Express, 30, 10732-10742(2022).

[24] MISHRA Y K, MISHRA S, JAYSWAL S C et al. Inclined laser drilling in glass fiber reinforced plastic using Nd: YAG laser[J]. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 44, 66(2022).

[25] DENG Quan, WANG Zhizhong, ZHANG Chi et al. Design and implementation for multi-pulsed and frequency-conversion LiDAR[J]. Laser & Infrared, 53, 853-858(2023).

[26] WU X, TANG D Y, LUAN X N et al. Bound states of solitons in a fiber laser mode locked with carbon nanotube saturable absorber[J]. Optics Communications, 284, 3615-3618(2011).

[27] ZHU T Y, WANG Z K, WANG D N et al. Observation of controllable tightly and loosely bound solitons with an all-fiber saturable absorber[J]. Photonics Research, 7, 61-68(2019).

[28] WANG Z H, WANG X J, SONG Y F et al. Generation and pulsating behaviors of loosely bound solitons in a passively mode-locked fiber laser[J]. Physical Review A, 101, 013825(2020).

[29] WANG Y, LIN N, GAO W L et al. Strain compensated robust semiconductor saturable absorber mirror for fiber lasers[J]. Chinese Optics Letters, 17, 071404(2019).

[30] LI W X, HUANG Z N, XIAO X P et al. 0.017 nm, 143 ps passively mode-locked fiber laser based on nonlinear polarization rotation[J]. Optics Letters, 48, 2676-2679(2023).

[31] SHI Junkai, WANG Guoming, LI Yao et al. Influence of spectral filtering on mode-locking operation of figure-eight Er-doped fiber laser[J]. Acta Physica Sinica, 68, 122-128(2019).