article · Optics Letters
This research presents a theoretical analysis of modulational instability within birefringent optical media characterised by pure quartic dispersion and weak Kerr nonlocal nonlinearity. Analysis of the modulational instability gain reveals that instability regions expand as a consequence of nonlocality. Direct numerical simulations confirm these analytical results and demonstrate the emergence of Akhmediev breathers within the total energy context. Furthermore, a balanced competition among nonlocality, dispersion, and other nonlinear effects creates the conditions necessary to produce long-lived optical structures. These outcomes improve the fundamental understanding of soliton behaviour in optical systems governed by pure-quartic dispersion. Consequently, the findings introduce novel directions for future exploration across domains involving nonlinear optics and laser technologies.
Modulational instability governs how light pulses evolve and break up within optical materials. By showing how pure quartic dispersion and nonlocal effects shape optical waves and generate stable structures, this theoretical work enhances foundational knowledge of wave mechanics. These insights assist optical physicists in exploring advanced light-matter interactions, potentially influencing future laser developments and nonlinear optical system designs.
The abstract describes early-stage theoretical research and numerical simulations rather than an applied technology. While it highlights relevance to nonlinear optics and lasers by revealing mechanisms to generate long-lived structures, it does not identify specific end users, industrial products, or readiness levels. As such, any direct practical deployment remains distant from current commercialisation pathways.
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The modulational instability (MI) phenomenon is theoretically investigated in birefringent optical media with pure quartic dispersion and weak Kerr nonlocal nonlinearity. We find from the MI gain that instability regions are more expanded due to nonlocality, which is confirmed via direct numerical simulations showing the emergence of Akhmediev breathers (ABs) in the total energy context. In addition, the balanced competition between nonlocality and other nonlinear and dispersive effects exclusively gives the possibility of generating long-lived structures which deepens our understanding of soliton dynamics in pure-quartic dispersive optical systems and opens new investigation routes in fields related to nonlinear optics and lasers.
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DOI: 10.1364/ol.472686
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