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Updated: Jul 16, 2026
08:48
Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Bragg-grating solitons in a semilinear dual-core system
1School of Electrical and Information Engineering, The University of Sydney, Sydney, NSW 2006, Australia.
Summary
Researchers explored gap solitons in optical fibers with two cores. They found stable gap solitons, including moving ones, and identified conditions for their stability, extending previous research on Bragg grating solitons.
Area of Science:
- Nonlinear Optics
- Condensed Matter Physics
- Optical Communications
Background:
- Bragg gratings (BG) are crucial for soliton control in optical fibers.
- Previous studies focused on single-core or simpler double-core systems.
- Gap solitons offer unique properties for optical signal processing.
Purpose of the Study:
- Investigate the existence and stability of gap solitons in a novel double-core optical fiber.
- Extend the understanding of Bragg grating (BG) solitons.
- Analyze the influence of core properties and group velocity on soliton behavior.
Main Methods:
- Analytical solutions derived for zero-velocity solitons in a limiting case.
- Numerical simulations employed for general cases of soliton existence and stability.
- Stability borders determined using an internal parameter of the soliton family.
Main Results:
- Exact solutions found for zero-velocity gap solitons under specific conditions.
- Numerical evidence of stable gap solitons, including moving solitons.
- Stability is maintained for large group velocities in the linear core, depending on frequency.
- Observed spontaneous symmetry breaking in interacting solitons.
Conclusions:
- The study expands the family of known Bragg grating (BG) solitons.
- Stable gap solitons exist in the investigated double-core fiber configuration.
- The findings provide insights into controlling and utilizing solitons in advanced optical systems.
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