INTERACTIONS OF SOLITONS WITH OSCILLATING TAILS

We investigate the dynamics and interactions of bright solitary waves in an optical fiber with fourth order dispersion. It is shown that rad iationless oscillatory tails of a single soliton create a potential ba rrier between neighbouring solitons and prevent them from interacting strongly. The case of strong interaction, where solitons exchange thei r energies is also considered. It is also shown that solitons with osc illating tails exist in communication lines with lumped amplifiers and lumped fourth-order dispersive elements.