We investigate the effects of the birefringence that is latent in ordinary single-mode fibers on the interaction between two adjacent soliton pulses. Such birefringence could be induced by distortions of the core cross section along the propagation axis owing to structural imperfections or external disturbances. As the incident angle of pulses into a fiber deviates from the slow axis, the behavior of two pulses undergoes a complete change because of the combined effect of the birefringence and the cross-phase modulation. Through numerical results we conclude that the birefringence corresponding to the ordinary single-mode fiber is large enough to affect the interaction between adjacent nonlinear pulses.

© 1991 Optical Society of America

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