[1] [1] P. A. Franken, A. E. Hill, C. W. Peters. Generation of optical harmonics. Phys. Rev. Lett., 1961, 7(1):118～123

[2] [2] G. D. Boyd, D. A. Kleinman. Second harmonic generations of Gaussian laser beams. J. Appl. Phys., 1968, 39(13):3597～3618

[3] [3] A. K. Cousins. Power conversion efficiency in second harmonic generation with nonuniform beams. IEEE J. Quantum Electron., 1993, 29(1):217～226

[4] [4] R. C. Eckardt, J. Reintjes. Phase matching limitations of high efficiency second harmonic generation. IEEE J. Quantum Electron., 1984, QE-20(10):1178～1187

[5] [5] M. H. Dunn, M. Ebrahimzaden. Paramentric generation of tunable light from continuous -wave to femtosecond pulses. Science, 1999, 286(11):1513～1517

[6] [6] S. Skupsky, K. Lee. Uniformity of energy deposition for laser driven fusion. J. Appl. Phys., 1983, 54(7):3662～3669

[7] [7] Arlee V. Smith, Mark S. Bowers. Phase distortions in sum-and difference-frequency mixing in crystals. J. Opt. Soc. Am. B, 1995, 12(1):49～57

[8] [8] D. Eimerl, J. M. Anerbach. Paraxial wave theory of second and third harmonic generation in uniaxial crystals. Ⅰ. Narrow band pump fields. J. Mod. Opt., 1995, 42:1037～1067