Abstract
An envelope function approach is used to give a theoretical description of the properties of nonlinear periodic structures. This method, in which the electric field is separated into slow and fast spatial components, shows that the slow field component satisfies the nonlinear Schrodinger equation. The well-known soliton solutions of this equation provide a theoretical description of the gap solitons found by Chen and Mills1 in their numerical studies of these structures. The more general solutions of the nonlinear Schrodinger equation provide a framework for understanding the properties of finite nonlinear periodic stacks. It should be noted that our method allows us to find these solutions analytically.
© 1988 Optical Society of America
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