[1] Y. D. Gong, M. Tang, J. Wu et al.. Dual-wavelength 10 GHz actively mode-locked erbium fiber laser incorporating highly nonlinear fibers［J］. IEEE Photon. Technol. Lett., 2005, 17(12): 2547～2549

[2] D. Pudo, L.R. Chen. Actively modelocked, quadruple-wavelength fiber laser with pump-controlled wavelength switching［J］. Electron. Lett., 2003, 39(3): 272～274

[3] J. W. Lou, T. E. Carruthers, M. Currie. 4×10 GHz mode-locked multiple-wavelength fiber laser［J］. IEEE Photon. Technol. Lett., 2004, 16(1): 51～53

[4] V. J. Matsaa, T. P. Newson, D. J. Richardson et al.. Selfstarting passively mode-locked fiber ring soliton laser exploiting nonlinear polarization rotation［J］. Electron. Lett., 1992, 28(15): 1391～1393

[5] D. U. Noske, M. J. Guy, K. Rottwitt et al.. Dual-wavelength operation of a passively mode-locked “figure-of-eight” ytterbium-erbium fibre soliton laser［J］. Opt. Commun., 1994, 108(4～6): 297～301

[6] Y. D. Gong, X. L. Tian, M. Tang et al.. Generation of dual wavelength ultrashort pulse outputs from a passive mode locked fiber ring laser［J］. Opt. Commun., 2006, 265(2): 628～631

[7] Zuxing Zhang, Li Zhan, Shouyu Luo et al.. Observation of two-color pulses in a passively mode-locking erbium-doped fiber ring laser［J］. Opt. Engng., 2006, 45(10): 104202

[8] Huiwen Xu, Hua Yang, Yong Chen et al.. Intrinsic dual-wavelength operation of a passively mode-locked fiber ring laser［J］. Opt. Commun., 2009, 282(14): 2934～2938

[9] Chuangxing Song, Wencheng Xu, Zhichao Luo et al.. Switchable and tunable dual-wavelength ultrashort pulse generation in a passively mode-locked erbium-doped fiber ring laser［J］. Opt. Commun., 2009, 282(22): 4408～4412

[10] W. Ye, W. Liu, T. Chen et al.。 Erbium-ytterbium co-doped multi-wavelength double-clad fiber laser around 1612nm［J］. Laser Physics, 2010, 20(7): 1636～1640