Abstract
It is shown theoretically that three types of separate soliton pairs: bright–bright, bright–dark, and dark–dark, can be established in a biased series circuit consisting of two centrosymmetric photorefractive crystals and the two solitons in a separate soliton pair can affect each other by the light-induced current. The effects of the intensities of soliton beams and background lights on the normalized profiles of solitons are discussed.
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