[1] [1] Bloembergen N. Laser-induced electric breakdown in solids［J］. IEEE Journal of Quantum Electronics, 1974, 10(3): 375-386.

[2] [2] Morgan C G. Laser-induced breakdown of gases［J］. Reports on Progress in Physics, 1975(38): 621-665.

[3] [3] Vogel A, Noack J, Hüttman G, et al. Mechanisms of femtosecond laser nanosurgery of cells and tissues［J］. Applied Physics B, 2005, 81(8): 1015-1047.

[4] [4] Keefer D R. Lasers-induced plasmas and applications［M］. New York: Marcel Dekker, 1989: 169.

[5] [5] Nibbering E T, Curley P F, Grillon G, et al. Conical emission from self-guided femtosecond pulses in air［J］. Optics Letters, 1996, 21(1): 62-65.

[6] [6] Baeva T, Gordienko S, Pukhov A. Theory of high-order harmonic generation in relativistic laser interaction with overdense plasma［J］. Physical Review E, 2006, 74(4): 046404.

[7] [7] D′Amico C, Houard A, Franco M, et al. Conical forward THz emission from femtosecond-laser-beam filamentation in air［J］. Physical Review Letters, 2007, 98(23): 235002.

[8] [8] Xu Z, Zhu X, Yang Y, et al. Super-luminescent jet light generated by femtosecond laser pulses［J］. Scientific Reports, 2014, 4: 3892.

[9] [9] Furusawa K, Takahashi K, Kumagai H, et al. Ablation characteristics of Au, Ag, and Cu metals using a femtosecond Ti∶sapphire laser［J］. Applied Physics A, 1999, 69(s1): S359-S366.

[10] [10] Lubatschowski H. Update on fs laser technology in ophthalmology［J］. Klinische Monatsbltter Für Augenheilkunde, 2013, 230(12): 1207-1212.

[11] [11] Zhao Y, Zhang N, Yang J, et al. Laser-induced air ionization microscopy［J］. Applied Physics Letters, 2006, 88(24): 241102.

[12] [12] Knight A K, Scherbarth N L, Cremers D A, et al. Characterization of laser-induced breakdown spectroscopy (LIBS) for application to space exploration［J］. Applied Spectroscopy, 2000, 54(3): 331-340.

[13] [13] Keldysh L V. Ionization in the field of a strong electromagnetic wave［J］. Journal of Experimental and Theoretical Physics, 1965, 20(5): 1307-1314.

[14] [14] Noack J, Vogel A. Laser-induced plasma formation in water at nanosecond to femtosecondtime scales: Calculation of thresholds, absorption coefficients, and energy density［J］. IEEE Journal of Quantum Electronics, 1999, 35(8): 1156-1167.

[15] [15] Yu Yang. The characteristics of micro air plasma and super-luminescent jet light generated by femtosecond laser pulses［M］. Tianjin: Nankai University, 2014.

[16] [16] Chin S L. Femtosecond laser filamentation［M］. New York: Springer, 2010: p1.

[17] [17] Couairon A, Mysyrowicz A. Femtosecond filamentation in transparent media［J］. Physics Reports, 2007, 441(2/4): 47-189.

[18] [18] Zhu X N, Fu R L. Emission spectra of microplasma generated by femtosecond laser pulses［J］. SPIE, 2002, 4914: 58-67.

[19] [19] Marburger J H. Self-focusing: Theory［J］. Progress in Quantum Electronics, 1975, 4: 35-110.

[20] [20] Xu Kuanhong. Investigations of the characteristics of femtosecond laser induced air plasma and the performances of optical coherence tomography system［D］. Tianjin: Nankai University, 2011.