110767 20230519145422.0 doi 10.1016/j.optlastec.2021.107018 sideral 123941 ART-2021-123941 eng López-Ripa, M. Coherent artifact and time-dependent polarization in amplified ultrafast erbium-doped fibre lasers 2021 Access copy available to the general public Unrestricted Mode-locked erbium-doped fibre lasers are ultrashort pulsed sources widely studied due to their versatility and multiple applications in the near infrared range. Here we present the experimental study of the emission of a passive mode-locked erbium-doped fibre laser with an amplification stage outside the cavity by means of Frequency Resolved Optical Gating (FROG) and spectral interferometry. Due to shot-to-shot instabilities, the FROG traces can be understood as the combination of two different traces, corresponding to the coherent artifact and the average pulse characteristics. We have modified a Principal Components Generalized Projections Algorithm, in order to make it able to retrieve efficiently both the coherent artifact and the average pulse. In addition, we study the temporal dependence of the polarization, showing that the pulses present time-dependent polarization with a stable spectral relative phase between the horizontal and vertical projections. Up to our knowledge, this is the first experimental study that shows the FROG measurements of unstable pulse trains associated with the coherent artifact and analyses the time-dependent polarization in ultrafast fibre lasers. info:eu-repo/grantAgreement/ES/MINECO/EQC2018-004117-P info:eu-repo/grantAgreement/ES/MINECO/FIS2017-87970-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.939 2021 PHYSICS, APPLIED 39 / 161 = 0.242 2021 Q1 T1 OPTICS 20 / 101 = 0.198 2021 Q1 T1 0.848 2021 Electrical and Electronic Engineering 2021 Q1 Atomic and Molecular Physics, and Optics 2021 Q1 7.6 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Alonso, B. Jarabo, S. Universidad de Zaragoza (orcid)0000-0002-2523-8598 Salgado-Remacha, F.J. Universidad de Zaragoza (orcid)0000-0002-6048-310X Aguado, J.C. Sola, Í.J. 2002 385 Universidad de Zaragoza Dpto. Física Aplicada Área Física Aplicada 2002 647 Universidad de Zaragoza Dpto. Física Aplicada Área Óptica 140 (2021), 107018 [9 pp] Opt. Laser Technol. Optics and Laser Technology 0030-3992 777785 http://zaguan.unizar.es/record/110767/files/texto_completo.pdf Postprint 2590689 http://zaguan.unizar.es/record/110767/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:110767 articulos driver 2023-05-18-14:08:36 ARTICLE