WIAS Preprint No. 3001, (2023)

Temporal cavity soliton interaction in passively mode-locked semiconductor lasers


  • Vladimirov, Andrei G.
    ORCID: 0000-0002-7540-8380

2020 Mathematics Subject Classification

  • 78A60 37N20 78M35

2008 Physics and Astronomy Classification Scheme

  • 42.65.-k 42.65.Re 42.60.Fc 42.65.Sf 42.65.Tg.


  • Mode-locking, semiconductor laser, delay differential equation model, temporal cavity solitons




Weak interaction due to gain saturation and recovery of temporal cavity solitons in a delay differential model of a long cavity semiconductor laser is studied numerically and analytically using an asymptotic approach. It is shown that apart from usual soliton repulsion leading to a harmonic mode-locking regime a soliton attraction is also possible in a laser with nonzero linewidth enhancement factor. It is shown numerically that the attraction can lead either to a soliton merging or to a pulse bound state formation.

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