[1] Segev M, Crosignani B, Yariv A, et al. Spatial solitons in photorefractive media [J]. Phys. Rev. Lett., 1992, 68(7): 923-926.
[2] Duree G C, Shultz J L, Salamo G J, et al. Observation of self-trapping of an optical beam due to the photorefractive effect [J]. Phys. Rev. Lett., 1993, 71(4): 533-536.
[3] Christodoulides D N, Carvalho M I. Bright, dark and gray spatial soliton states in photorefvactive media [J]. J. Opt. Soc. Am. B, 1995, 12(9): 1628-1633.
[4] Segev M, Valley G C, Bashaw M C, et al. Photovoltaic spatial solitons [J]. J. Opt. Soc. Am. B, 1997, 14(7): 1772-1781.
[7] Liu Jinsong, Lu keqing. Screening-photorefractive spatial solitons in biased photovoltaic-photorefractive crystals and their self-deflection [J]. J. Opt. Soc. Am. B, 1999, 16(4): 550-555.
[9] Christodoulides D N, Singh S R, Carvalho M I, et al. Incoherently coupled solitons in biased photorefractive crystals [J]. Appl. Phy. Lett., 1996, 68(13): 1763-1675.
[10] Chen Z, Segev M, et al. Observation of incoherently coupled photorefractive spatial soliton pairs [J]. Opt. Lett., 1996, 21(8): 1436-1438 .
[13] Lu Keqing, Zhang Yanpeng, Tang Tiantong, et al. Incoherently coupled steady-state soliton pairs in biased photorefractive-photovoltaic materials [J]. Phys. Rev. E, 2001, 64(5): 056603.