[1] Agrawal G P. Induced focusing of optical beams in self-defocusing nonlinear media [J]. Phys. Rev. Lett., 1990, 64(21): 2487-2490.
[2] Stentz A J, Kauranen M, Maki J J, et al. Induced focusing and spatial wave breaking from cross-phase modulation in a self-defocusing medium [J]. Opt. Lett., 1992, 17(1): 19-21.
[3] Hickmann J M, Gomes A S L, Araujo C. Observation of spatical cross-phase modulation effects in a self-defocusing nonlinear medium [J]. Phys. Rev. Lett., 1992, 68(24): 3547-3550.
[5] Grischkowsky D. Self-focusing of light by potassium vapor [J]. Phys. Rev. Lett., 1970, 24: 866-869.