[1] [1] CROSIGNANI B,SEGEV M,ENGIN D,et al.Self-trapping of optical beams in photorefractive media[J].JOSA B,1993,10(3):446-453.

[2] [2] SEGEV M,VALLEY G C,CROSIGNANI B,et al.Steady-state spatial screening solitons in photorefractive materials with external applied field[J].Phys Rev Lett,1994,73(24):3211-3214.

[3] [3] CHRISTODOULIDES D N,CARVALHO M I.Bright,dark,and gray spatial soliton states in photorefractive media[J].JOSA B,1995,12(9):1628-1633.

[4] [4] SEGEV M,SHIH M,VALLEY G C.Photorefractive screening solitons of high and low intensity[J].JOSA B,1996,13(4):706-718.

[5] [5] GARCíA-QUIRINO G S,ITURBE-CASTILLO M D,VYSOUKH V A,et.al.Observation of interaction forces between one-dimensional spatial solitons in photore-fractive crystals[J].Opt Lett,1997,22(3):154-156.

[6] [6] KR(O)LIKOWSKI W,HOLMSTROM S A.Fusion and birth of spatial solitons upon collision[J].Opt Lett,1997,22(6):369-371.

[7] [7] MENG H,SALAMO G,SHIH M,et.al.Coherent collisions of photorefractive solitons[J].Opt Lett,1997,22(7):488-450.

[8] [8] KR(O)LIKOWSKI W,DENZ C,STEPKEN A,et al.Interaction of spatial photo-refractive solitons[J].Quan Semi Opt,1998,10:823-837.

[9] [9] ANDERSON D,LISAK M.Bandwidth limits due to incoherent soliton interaction in optical-fiber communication systems[J].Phys Rev A,1985,32(4):2270-2274.

[11] [11] CHRISTODOULIDES D N,CARVALHO M I.Bright,dark,and gray spatial soliton states in photorefractive media[J].JOSA B,1995,12(9):1628-1633.