Analysis of modulated linear wave packets and gap solitons in coupled optical fibers

2025/04/30 by Shaykin Dmitriy, Dmitriy, Shaykin
Engineering · Physics and Astronomy · #FOS: Physical sciences #Nonlinear Photonic Systems #Optical Network Technologies #Optics (physics.optics) #Photonic Crystal and Fiber Optics

paper · pdf · doi:10.48550/arxiv.2504.21424

openalex publication_date 2025/04/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A coupled pair of waveguides with refractive indices of different signs is considered. It is shown that the gap in the linear wave spectrum closes if these waves are amplitude modulated. To look for solitons as envelopes of exponentially modulated wave packets, the dispersion law of these packets is used. Different decompositions of the dispersion law lead to solutions related to different parts of the spectrum. Numerical calculations demonstrate a good agreement with analytical predictions.

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