Journal
PHYSICAL REVIEW A
Volume 104, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.104.043526
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Funding
- Australian Research Council (ARC) Discovery Project [DP180102234]
- Asian Office of Aerospace Research and Development (AOARD) [FA2386-19-1-4067]
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In this study, optical properties of pure-quartic solitons are examined. They are found to be stable solitons with complex phase structure and asymmetric spectrum, traveling at different speeds as members of a larger family arising from high orders of dispersion.
Optical temporal solitons, arising from self-phase modulation and negative quadratic (beta(2)) dispersion, are Galilean invariant, and therefore their properties do not depend on their group velocity. This is no longer true for pure-quartic soliton pulses arising from quartic( )(beta(4)) dispersion, for which a change in group velocity necessarily leads to nonzero quadratic and cubic (beta(3)) dispersion. Analyzing the generalized nonlinear Schrodinger equation for such dispersion relations analytically and numerically, we find that pure-quartic solitons are members of a larger family traveling at other speeds. These solitons, which appear to be stable, have a complex phase structure and have an asymmetric spectrum. Our results extend the understanding of solitons arising from high orders of dispersion.
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