Generation of a New Type of Similaritons in Optical Fibers

Based on a detailed numerical analysis and comparison with experimental observations, a nonlinear process of the generation of a new type of similaritons in fibers is presented in the region of negative dispersion. These similaritons are needle-like in shape with a sharp top and a large base and are formed in passive single-mode optical fibers with weak nonlinearity and strong group velocity dispersion. Consistent boundary conditions are found for the parameters of the input pulse and the characteristics of the optical fiber under which such self-similarly propagating pulses are generated.