[1] Martinez A, Sun Z P. Nanotube and graphene saturable absorbers for fibre lasers[J]. Nature Photonics, 2013, 7(11): 842-845.

[2] Nishizawa N, Seno Y, Sumimura K, et al. All-polarization-maintaining Er-doped ultrashort-pulse fiber laser using carbon nanotube saturable absorber[J]. Optics Express, 2008, 16(13): 9429-9435.

[3] Du J, Wang Q K, Jiang G B, et al. Ytterbium-doped fiber laser passively mode locked by few-layer molybdenum disulfide (MoS2) saturable absorber functioned with evanescent field interaction[J]. Scientific Reports, 2015, 4: 6346.

[4] 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.

[5] Sun Z, Rozhin A G, Wang F, et al. L-band ultrafast fiber laser mode locked by carbon nanotubes[J]. Applied Physics Letters, 2008, 93(6): 061114.

[6] 王光斗, 杨光, 刘艳格, 等. 掺铥光纤激光器中的孤子束和高阶谐波锁模[J]. 中国激光, 2017, 44(8): 0801011.

    Wang G D, Yang G, Liu Y G, et al. Soliton bundles and high-order harmonic mode-locked in Tm-doped fiber laser[J]. Chinese Journal of Lasers, 2017, 44(8): 0801011.

[7] 张怡静, 刘江, 王璞. 全光纤结构波长可调谐被动锁模掺铥光纤激光器[J]. 中国激光, 2018, 45(10): 1001003.

    Zhang Y J, Liu J, Wang P. All-fiber wavelength-tunable passively mode-locked thulium-doped fiber laser[J]. Chinese Journal of Lasers, 2018, 45(10): 1001003.

[8] Wang J Z, Liang X Y, Hu G H, et al. 152 fs nanotube-mode-locked thulium-doped all-fiber laser[J]. Scientific Reports, 2016, 6: 28885.

[9] Zhu X J, Wang C H, Liu S X, et al. Switchable dual-wavelength and passively mode-locked all-normal-dispersion Yb-doped fiber lasers[J]. IEEE Photonics Technology Letters, 2011, 23(14): 956-958.

[10] 宋秋艳, 陈根祥, 谭晓琳, 等. 基于单壁碳纳米管的多波长被动锁模激光器[J]. 中国激光, 2014, 41(1): 0102002.

    Song Q Y, Chen G X, Tan X L, et al. Multi-wavelength passively mode-locked laser based on single-walled carbon nanotube[J]. Chinese Journal of Lasers, 2014, 41(1): 0102002.

[11] 冯素春, 任文华, 陈曼雅, 等. 基于双芯光纤滤波器和非线性偏振旋转效应的多波长光纤激光器[J]. 中国激光, 2014, 41(6): 0605006.

    Feng S C, Ren W H, Chen M Y, et al. Multi-wavelength fiber laser employing twin-core fiber filter and nonlinear polarization rotation[J]. Chinese Journal of Lasers, 2014, 41(6): 0605006.

[12] Xu Z W, Zhang Z X. All-normal-dispersion multi-wavelength dissipative soliton Yb-doped fiber laser[J]. Laser Physics Letters, 2013, 10(8): 085105.

[13] Zhang Z X, Xu Z W, Zhang L. Tunable and switchable dual-wavelength dissipative soliton generation in an all-normal-dispersion Yb-doped fiber laser with birefringence fiber filter[J]. Optics Express, 2012, 20(24): 26736-26742.

[14] Moon D S, Sun G Y, Lin A X, et al. Tunable dual-wavelength fiber laser based on a single fiber Bragg grating in a Sagnac loop interferometer[J]. Optics Communications, 2008, 281(9): 2513-2516.

[15] Li X H, Wang Y S, Zhao W, et al. All-normal dispersion, figure-eight, tunable passively mode-locked fiber laser with an invisible and changeable intracavity bandpass filter[J]. Laser Physics, 2011, 21(5): 940-944.

[16] Zhao X, Zheng Z, Liu L, et al. Switchable, dual-wavelength passively mode-locked ultrafast fiber laser based on a single-wall carbon nanotube mode locker and intracavity loss tuning[J]. Optics Express, 2011, 19(2): 1168-1173.

[17] Han D D, Zeng C. Investigations of switchable fiber soliton laser mode-locked by carbon nanotubes[J]. Optics Communications, 2014, 319: 25-30.

[18] Zhao J Q, Wang Y G, Ruan S C, et al. Three operation regimes with an L-band ultrafast fiber laser passively mode-locked by graphene oxide saturable absorber[J]. Journal of the Optical Society of America B, 2014, 31(4): 716-722.

[19] Rosa H G, Steinberg D. Thoroh de Souza E A. Explaining simultaneous dual-band carbon nanotube mode-locking erbium-doped fiber laser by net gain cross section variation[J]. Optics Express, 2014, 22(23): 28711-28718.

[20] 朱攀, 桑梅, 高杨, 等. 基于单壁碳纳米管的波长可切换被动锁模光纤激光器[J]. 中国激光, 2013, 40(2): 0202005.

    Zhu P, Sang M, Gao Y, et al. Wavelength switchable passive mode-locking fiber laser based on single-wall carbon nanotube[J]. Chinese Journal of Lasers, 2013, 40(2): 0202005.

[21] Guo B, Yao Y, Yan P G, et al. Dual-wavelength soliton mode-locked fiber laser with a WS2-based fiber taper[J]. IEEE Photonics Technology Letters, 2016, 28(3): 323-326.

[22] Wang X D, Luo Z C, Liu M, et al. Wavelength-switchable femtosecond pulse fiber laser mode-locked by silica-encased gold nanorods[J]. Laser Physics Letters, 2016, 13(4): 045101.

[23] Huang S S, Wang Y G, Yan P G, et al. Tunable and switchable multi-wavelength dissipative soliton generation in a graphene oxide mode-locked Yb-doped fiber laser[J]. Optics Express, 2014, 22(10): 11417-11426.

[24] Lin H Q, Guo C Y, Ruan S C, et al. Tunable and switchable dual-wavelength dissipative soliton operation of a weak-birefringence all-normal-dispersion Yb-doped fiber laser[J]. IEEE Photonics Journal, 2013, 5(5): 1501807.

[25] Yu Chamorovskiy A, Marakulin A V, Kurkov A S, et al. Tunable Ho-doped soliton fiber laser mode-locked by carbon nanotube saturable absorber[J]. Laser Physics Letters, 2012, 9(8): 602-606.

[26] Yan Z Y, Li X H, Tang Y L, et al. Tunable and switchable dual-wavelength Tm-doped mode-locked fiber laser by nonlinear polarization evolution[J]. Optics Express, 2015, 23(4): 4369-4376.

[27] Yan Z Y, Tang Y L, Sun B, et al. Switchable multi-wavelength Tm-doped mode-locked fiber laser[J]. Optics Letters, 2015, 40(9): 1916-1919.

[28] Jiang K, Wu Z C, Fu S N, et al. Switchable dual-wavelength mode-locking of thulium-doped fiber laser based on SWNTs[J]. IEEE Photonics Technology Letters, 2016, 28(19): 2019-2022.

[29] Franco P, Midrio M, Tozzato A, et al. Characterization and optimization criteria for filterless erbium-doped fiber lasers[J]. Journal of the Optical Society of America B, 1994, 11(6): 1090-1097.

[30] Luo J L, Li L, Ge Y Q, et al. L-band femtosecond fiber laser mode locked by nonlinear polarization rotation[J]. IEEE Photonics Technology Letters, 2014, 26(24): 2438-2441.

[31] 贾浩天, 王军利, 滕浩, 等. 亚皮秒L波段掺铒全光纤锁模激光器[J]. 中国激光, 2016, 43(11): 1101008.

    Jia H T, Wang J L, Teng H, et al. Sub-picosecond L-band erbium-doped all fiber mode-locked laser[J]. Chinese Journal of Lasers, 2016, 43(11): 1101008.

[32] Yu Z H, Song Y R, Dong X Z, et al. Mode locked Er-doped fiber laser with single-wall carbon nanotube saturable absorber[J]. Chinese Optics Letters, 2013, 11(s2): s21403.

[33] Sun Z P, Hasan T, Wang F Q, et al. Ultrafast stretched-pulse fiber laser mode-locked by carbon nanotubes[J]. Nano Research, 2010, 3(6): 404-411.

[34] Yamashita S, Inoue Y, Maruyama S, et al. Saturable absorbers incorporating carbon nanotubes directly synthesized onto substrates and fibers and their application to mode-locked fiber lasers[J]. Optics Letters, 2004, 29(14): 1581-1583.

[35] Zhang H, Tang D Y, Zhao L M, et al. Compact graphene mode-locked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion[J]. Laser Physics Letters, 2010, 7(8): 591-596.

[36] GovindP, Agrawal. 非线性光纤光学原理及引用[M]. 贾东方, 余震虹, 译. 2版. 北京: 电子工业出版社, 2010: 674- 682.

    Agrawal GP. Applications of nonlinear fiber optics[M]. Jia D F, Yu Z H. Transl. 2nd ed. Beijing: Publishing House of Electronics Industry, 2010: 674- 682.

[37] Becker PC, Olsson NA, Simpson JR. Erbium doped fiber amplifiers, fundamentals and technology[M]. San Diego: Academic Press, 1999: 132- 145.

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

[39] Yan D, Li X L, Zhang S M, et al. L-band wavelength-tunable dissipative soliton fiber laser[J]. Optics Express, 2016, 24(2): 739-748.