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- W2004659627 abstract "Short optical pulse propagation is investigated in the light guide characterized with a strong dependence of the fiber material refractive index on the radial coordinate and a weak dependence on the longitudinal coordinate, with a weak spatial bending of the light guide axis being allowed as well. A three-dimensional nonlinear wave equation used in modeling the process is solved asymptotically with respect to a small parameter setting the order of magnitude of the pulse amplitude. A relationship between the propagating modes and the eigenvalues and eigenfunctions of a singular Sturm-Liouville problem is elucidated. The pulse propagation is shown to be three-scale: the high-frequency carrier is modulated with the envelope which evolves in a two-scale manner and is described with a nonlinear Schroedinger equation with coefficients depending on the longitudinal coordinate. For several types of the transverse and longitudinal inhomogeneities, expressions through elementary functions are obtained for the transverse distribution of the wave field and the envelope soliton. The possibility is stated for managing pulse parameters by means of varying the transverse and longitudinal inhomogeneities of the light guide. A formula for amplitude modulation of the pulse due to the third-order dispersion and self-steepening is obtained and it is shown that under a certain relationship between these quantities the envelope can propagate without distortions." @default.
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- W2004659627 date "2001-10-19" @default.
- W2004659627 modified "2023-09-23" @default.
- W2004659627 title "<title>Subpicosecond pulse propagation in graded-index optical fibers under the influence of weak longitudinal inhomogeneities and higher-order nonlinear and dispersive effects</title>" @default.
- W2004659627 doi "https://doi.org/10.1117/12.444918" @default.
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