[1] [1] M. K. Reed, M. K. Steiner-Shepard, D. K. Negus. Widely tunable femtosecond optical parametric amplifier at 250 kHz with a Ti:sapphire regenerative amplifier. Opt. Lett., 1994, 19(22):1855～1857

[2] [2] V. Krylov, A. Kalintsev, A. Rebane et al.. Noncollinear parametric generation in LiIO3 and β-barium borate by frequency-doubled femtosecond Ti:sapphire laser pulses. Opt. Lett., 1995, 20(2):151～153

[3] [3] R. Danielius, A. Piskarskas, P. Di Trapani et al.. A collinearly phase-matched parametric generator/amplifier of visible femtosecond pulses. IEEE J. Quantum Electron., 1998, 34(3):459～464

[4] [4] G. M. Gale, M. Cavallari, T. J. Driscoll et al.. Sub-20-fs tunable pulses in the visible from an 82-MHz optical parametric oscillator. Opt. Lett., 1995, 20(14):1562～1564

[5] [5] I. N. Ross, P. Matousek, M. Towrie et al.. The prospects for ultrashort pulse duration and ultrahigh intensity using optical parametric chirped pulse amplifiers. Opt. Comm., 1997, 144:125～133

[6] [6] A. Shirakawa, I. Sakane, M. Takasaka et al.. Sub-5-fs visible pulse generation by pulse-front-matched noncollinear optical parametric amplification. Appl. Phys. Lett., 1999, 74(16):2268～2270

[7] [7] R. Danielius, A. Piskarskas, A. Stabinis et al.. Traveling-wave parametric generation of widely tunable, highly coherent femtosecond light pulses. J. Opt. Soc. Am. B, 1993, 10(11):2222～2232

[8] [8] Ichiro Shoji, Hirotaka Nakamura, Keisuke Ohdaira et al.. Absolute measurement of second-order nonlinear-optical coefficients of β-BaB2O4 for visible to ultraviolet second-harmonic wavelengths. J. Opt. Soc. Am. B, 1999, 16(4):620～624

[9] [9] Lei Shizhan. Handbook of Laser Technology. Beijing: Science Press, First edition, 1992. 920