[1] [1] K. M. Davis, K. Miura, N. Sugimoto et al.. Writing waveguides in glass with a femtosecond laser［J］. Opt. Lett., 1996, 21(21): 1729～1731

[2] [2] R. R. Gattass, E. Mazur. Femtosecond laser micromachining in transparent materials［J］. Nature Photonics, 2008, 2: 219～225

[3] [3] M. Ams, G. D. Marshall, P. Dekker et al.. Ultrafast laser written active devices［J］. Laser & Photon. Rev., 2009, 3(6): 535～544

[4] [4] G. Della Valle, R. Osellame, P. Laporta. Micromachining of photonic devices by femtosecond laser pulses［J］. J. Opt. A: Pure Appl. Opt., 2009, 11(1): 013001

[5] [5] C. Zhang, N. Dong, J. Yang et al.. Channel waveguide lasers in NdGGG crystals fabricated by femtosecond laser inscription［J］. Opt. Express, 2011, 19(13): 12503～12508

[6] [6] A. M. Streltsov, N. F. Borrelli. Fabrication and analysis of a directional coupler written in glass by nanojoule femtosecond laser pulses［J］. Opt. Lett., 2001, 26(1): 42～43

[7] [7] Liu Bowen, Hu Minglie, Song Youjian et al.. Photonic crystal fiber femtosecond laser amplifier with millijoules and 100 fs level output［J］. Chinese J. Lasers, 2010, 37(9): 2415～2418

[8] [8] Y. Nasu, M. Kohtoku, Y. Hibino. Low-loss waveguides written with a femtosecond laser for flexible interconnection in a planar light-wave circuit［J］. Opt. Lett., 2005, 30(7): 723～725

[9] [9] M. Pospiech, M. Emons, A. Steinmann et al.. Double waveguide couplers produced by simultaneous femtosecond writing［J］. Opt. Express, 2009, 17(5): 3555～3563

[10] [10] M. Kim, D. J. Hwang, H. Jeon et al.. Single cell detection using a glass-based optofluidic device fabricated by femtosecond laser pulses［J］. Lab Chip, 2009, 9(2): 311～318

[11] [11] S. M. Eaton, M. L. Ng, R. Osellame et al.. High refractive index contrast in fused silica waveguides by tightly focused, high-repetition rate femtosecond laser［J］. Journal of Non-Crystalline Solids, 2011, 357(11-13): 2387～2391

[12] [12] A. M. Streltsov, N. F. Borrelli. Study of femtosecond-laser-written waveguides in glasses［J］. J. Opt. Soc. Am. B, 2002, 19(10): 2496～2504

[13] [13] C. B. Schaffer, J. F. Garcia, E. Mazur. Bulk heating of transparent materials using a high-repetition-rate femtosecond laser［J］. Appl. Phys. A, 2003, 76(3): 351～354

[14] [14] J. W. Chan, T. Huser, S. Risbud et al.. Structural changes in fused silica after exposure to focused femtosecond laser pulses［J］. Opt. Lett., 2001, 26(21): 1726～1728

[15] [15] E. Bricchi, B. G. Klappauf, P. G. Kazansky. Form birefringence and negative index change created by femtosecond direct writing in transparent materials［J］. Opt. Lett., 2004, 29(1): 119～121

[16] [16] R. Taylor, C. Hnatovsky, E. Simova. Applications of femtosecond laser induced self-organized planar nanocracks inside fused silica glass［J］. Laser Photon. Rev., 2008, 2(1-2): 26～46

[17] [17] J. Burghoff, S. Nolte, A. Tunnermann. Origins of waveguiding in femtosecond laser-structured LiNbO3［J］. Appl. Phys. A, 2007, 89(1): 127～132

[18] [18] R. Graf, A. Fernandez, M. Dubov et al.. Pearl-chain waveguides written at megahertz repetition rate［J］. Appl. Phys. B, 2007, 87(1): 21～27

[19] [19] H. Zhang, S. M. Eaton, P. R. Herman. Low-loss Type II waveguide writing in fused silica with single picosecond laser pulses［J］. Opt. Express, 2006, 14(11): 4826～4834

[20] [20] S. M. Eaton, H. Zhang, M. L. Ng et al.. Transition from thermal diffusion to heat accumulation in high repetition rate femtosecond laser writing of buried optical waveguides［J］. Opt. Express, 2008, 16(13): 9443～9458

[21] [21] B. Poumellec, M. Lancry, A. Chahid-Erraji et al.. Modification thresholds in femtosecond laser processing of pure silica: review of dependencieson laser parameters［invited］［J］. Opt. Materials Express, 2011, 1(4): 766～782

[22] [22] D. Homoelle, S. Wielandy, A. L. Gaeta et al.. Infrared photosensitivity in silica glasses exposed to femtosecond laser pulses［J］. Opt. Lett., 1999, 24(18): 1311～1313

[23] [23] Y. Yue, G. Kai, Z. Wang et al.. Highly birefringent elliptical-hole photonic crystal fiber with squeezed hexagonal lattice［J］. Opt. Lett., 2007, 32(5): 469～471

[24] [24] J. Wang, C. Jiang, W. Hu et al.. Dispersion and polarization properties of elliptical air-hole-containing photonic crystal fibers［J］. Opt. & Laser Technol., 2007, 39(5): 913～917

[25] [25] M. J. Steel, R. M. Osgood, Jr. Elliptical-hole photonic crystal fibers［J］. Opt. Lett., 2001, 26(4): 229～231