Coherent artifact and time-dependent polarization in amplified ultrafast erbium-doped fibre lasers

López-Ripa, M. ; Alonso, B. ; Jarabo, S. (Universidad de Zaragoza) ; Salgado-Remacha, F.J. (Universidad de Zaragoza) ; Aguado, J.C. ; Sola, Í.J.

Resumen: 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.

Idioma: Inglés

DOI: 10.1016/j.optlastec.2021.107018

Año: 2021

Publicado en: Optics and Laser Technology 140 (2021), 107018 [9 pp]
ISSN: 0030-3992

Factor impacto JCR: 4.939 (2021)

Categ. JCR: PHYSICS, APPLIED rank: 39 / 161 = 0.242 (2021) - Q1 - T1
Categ. JCR: OPTICS rank: 20 / 101 = 0.198 (2021) - Q1 - T1

Factor impacto CITESCORE: 7.6 - Engineering (Q1) - Physics and Astronomy (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 0.848 - Electrical and Electronic Engineering (Q1) - Atomic and Molecular Physics, and Optics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/EQC2018-004117-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2017-87970-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Física Aplicada (Dpto. Física Aplicada)
Área (Departamento): Área Óptica (Dpto. Física Aplicada)