Incoherently coupled screening-photovoltaic soliton pairs

It is predicted in this paper that incoherently coupled screening-photovoltaic soliton pails are possible in biased photovoltaic-photorefractive crystals under steady-state conditions. These soliton pairs are established by the solitary beams which have the same polarization, wavelength,and are mutually incoherent. The screening-photovoltaic soliton pairs can be considered as the united form of screening soliton pairs and closed-circuit photovoltaic soliton pairs. They reduce to screening soliton pairs in the absence of photovoltaic effect,whereas they become photovoltaic soliton pairs under the closed-circuit condition when the bias field is not applied.