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Abstract <p>This paper presents the findings of an experimental study of noise-like pulses and loosely bound solitons in an Er-doped fiber laser with hybrid mode-locking. The generation of noise-like pulses with a pedestal of 0.954 ps and a peak duration of 66 fs, as well as loosely bound two-pulse solitons with a duration of 141 fs and a pulse spacing of 7.31 ps, is demonstrated in dispersion-managed cavity. Experiments show that the formation of noise-like pulses and bound solitons in the region of positive net-cavity group velocity dispersion is associated with modulation instability-driven pulse splitting. This study also explores the influence of this mechanism on the temporal fluctuations of multipulse states, its manifestation in the spectral region, and its interaction with the quasi-periodic intensity modulation mechanism, which is also present in the modes under consideration. The transformation of one mode into another is examined in detail, and its association with changes in intracavity energy levels is elucidated.</p>

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Transformation of Noise-Like Pulses into Loosely Bound Solitons in Er-Doped Fiber Laser

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • A. Y. Fedorenko,
  • I. O. Orekhov,
  • D. A. Dvoretskiy,
  • Almikdad Ismaeel,
  • S. G. Sazonkin,
  • L. K. Denisov,
  • V. E. Karasik

摘要

Abstract

This paper presents the findings of an experimental study of noise-like pulses and loosely bound solitons in an Er-doped fiber laser with hybrid mode-locking. The generation of noise-like pulses with a pedestal of 0.954 ps and a peak duration of 66 fs, as well as loosely bound two-pulse solitons with a duration of 141 fs and a pulse spacing of 7.31 ps, is demonstrated in dispersion-managed cavity. Experiments show that the formation of noise-like pulses and bound solitons in the region of positive net-cavity group velocity dispersion is associated with modulation instability-driven pulse splitting. This study also explores the influence of this mechanism on the temporal fluctuations of multipulse states, its manifestation in the spectral region, and its interaction with the quasi-periodic intensity modulation mechanism, which is also present in the modes under consideration. The transformation of one mode into another is examined in detail, and its association with changes in intracavity energy levels is elucidated.