Open AccessGain-driven spectral-temporal noise-like pulse dynamics in a passively mode-locked fiber laser
Author(s) -
O. Pottiez,
J. P. Lauterio-Cruz,
Y. E. Bracamontes-Rodríguez,
H E Ibarra-Villalón,
J. C. Hernández-García,
M. Bello-Jimènez,
E. A. Kuzin
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.034742
Subject(s) - optics , fiber laser , physics , noise (video) , erbium , pulse (music) , laser , wavelength , mode locking , artificial intelligence , detector , computer science , image (mathematics)
We study numerically complex noise-like pulse dynamics in a passively mode-locked erbium-doped fiber laser. Wavelength-dependent gain dynamics is modeled as a combination of a three-level and a four-level system, which approximate the gain behavior in the 1530-nm and 1560-nm regions, respectively. The typical deformation of the erbium gain spectrum as it saturates is properly reproduced by this approach. Several puzzling noise-like pulse dynamics that were recently observed experimentally are qualitatively reproduced numerically, in particular slow quasi-periodic energy variations and the emergence and walkoff of wavelength-shifted radiation components. These results clearly reveal that gain dynamics is deeply involved in the onset of such complex temporal and spectral instabilities in these sources.