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Linear mode coupling (LMC) in ultrafast fiber lasers creates deformable vector solitons (VSs). Weak LMC yields heteronuclear VSs, while strong LMC generates homonuclear VSs with unique "caterpillar" motions.

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Area of Science:

  • Nonlinear optics
  • Ultrafast photonics
  • Fiber laser technology

Background:

  • Vector solitons (VSs) are localized structures in nonlinear systems.
  • The impact of intermodal linear coupling on VS properties is not well understood.

Purpose of the Study:

  • Investigate the influence of linear mode coupling (LMC) on vector soliton dynamics.
  • Explore novel VS patterns and their potential applications in ultrafast optical sources.

Main Methods:

  • Utilized an ultrafast fiber laser as an experimental platform.
  • Predicted and demonstrated the effects of LMC on VS temporal and spectral structures.

Main Results:

  • Linear mode coupling induces deformable vector solitons.
  • Weak LMC results in heteronuclear VSs (dissimilar polarization modes).
  • Strong LMC leads to homonuclear VSs with 'caterpillar' motions.

Conclusions:

  • LMC significantly alters vector soliton characteristics.
  • New VS patterns are discovered, offering versatile ultrafast optical source possibilities.