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Pure-quartic solitons in multimode mode-locked fiber lasers
Optics Express
|July 30, 2025
Summary
Pure-quartic solitons (PQS) were characterized in multimode fiber lasers, achieving higher energy than conventional methods. This study explores PQS dynamics and their potential for advanced laser design.
Area of Science:
- Nonlinear Optics
- Fiber Lasers
- Ultrafast Photonics
Background:
- Conventional soliton lasers rely on second-order dispersion, limiting energy scaling.
- Pure-quartic solitons (PQS), governed by fourth-order dispersion, offer a potential alternative.
- PQS arise from a balance between negative fourth-order dispersion and self-phase modulation.
Purpose of the Study:
- To characterize PQS dynamics in a dispersion-managed multimode fiber cavity.
- To investigate the impact of intermodal crosstalk on PQS.
- To explore nonlinear energy transfer and chaotic soliton bunch excitation.
Main Methods:
- Dispersion-managed strategies were employed.
- Characterization of PQS dynamics in a multimode mode-locked fiber cavity.
- Comparison between single-mode and multimode cavities.
Main Results:
- PQS were successfully characterized in a multimode cavity for the first time.
- Spectral-sideband positions differed slightly between spatial modes due to nonlinearities.
- Multimode PQS exhibited higher energy compared to single-mode counterparts.
- Intermodal crosstalk induced spectral symmetry breaking and sideband suppression.
- Nonlinear energy transfer and chaotic soliton bunch excitation mechanisms were investigated.
Conclusions:
- PQS in multimode cavities offer a pathway to higher-energy soliton lasers.
- Higher-order dispersion can be utilized for advanced optical pulse control.
- Findings enable innovations in nonlinear optics and laser applications.
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