Raman peak shifts due to walk-off in non-instantaneous Kerr media with higher-order effects
| Autor: | Michel-Rostand Soumo Tchio, Saïdou Abdoulkary, Alidou Mohamadou |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Cross-phase modulation Statistical and Nonlinear Physics 01 natural sciences Instability Atomic and Molecular Physics and Optics 010309 optics symbols.namesake Superposition principle Modulation 0103 physical sciences Dispersion (optics) symbols Atomic physics Raman spectroscopy Self-phase modulation Raman scattering |
| Zdroj: | Journal of the Optical Society of America B. 36:3479 |
| ISSN: | 1520-8540 0740-3224 |
| DOI: | 10.1364/josab.36.003479 |
| Popis: | We study analytically and numerically the modulation instability (MI) of two incoherently co-propagating optical pulses in nonlinear fiber, taking into account high-order nonlinearity, walk-off effects, delay response time, and cross-phase modulation in several dispersion regimes. We show that higher-order nonlinearity is responsible for superposition of the secondary MI spectrum. We realize that there is a peak located in the emerged Raman band that we call “Raman peak” due to the combined effects of third-order dispersion, delay response time, and the opposite sign of the fourth-order dispersion parameter. These peaks are shifted toward higher frequencies when the walk-off increases. |
| Databáze: | OpenAIRE |
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