Abstract

New types of solitonic pulses are obtained theoretically based on the solutions for the nonlinear Schrödinger (NLS) equation. Unlike the earlier results, in the normal dispersion region, the novel bright solitonic pulses are observed. Depending on the parameters' values, the properties of both bright and dark solitonic pulses are described in the same expression. Furthermore, those solitonic pulses are found to be evolved into bright and dark ones under certain conditions. This might be a potential application in optical communication systems which can produce bright and dark solitonic pulses simultaneously.

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