Design of an amplifier model accounting for thermal effect in fully aperiodic large pitch fibers

K. Tragni, C. Molardi, F. Poli, R. Dauliat, B. Leconte, D. Darwich, R. Du Jeu, M. A. Malleville, R. Jamier, S. Selleri, P. Roy, A. Cucinotta

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Yb-doped Photonic Crystal Fibers (PCFs) have triggered a significant power scaling into fiber-based lasers. However thermally-induced effects, like mode instability, can compromise the output beam quality. PCF design with improved Higher Order Mode (HOM) delocalization and effective thermal resilience can contain the problem. In particular, Fully- Aperiodic Large-Pitch Fibers (FA-LPFs) have shown interesting properties in terms of resilience to thermal effects. In this paper the performances of a Yb-doped FA-LPF amplifier are experimentally and numerically investigated. Modal properties and gain competition between Fundamental Mode (FM) and first HOM have been calculated, in presence of thermal effects. The main doped fiber characteristics have been derived by comparison between experimental and numerical results.

Original languageEnglish
Title of host publicationFiber Lasers XV
Subtitle of host publicationTechnology and Systems
EditorsIngmar Hartl, Adrian L. Carter
ISBN (Electronic)9781510615090
Publication statusPublished - Jan 1 2018
EventFiber Lasers XV: Technology and Systems 2018 - San Francisco, United States
Duration: Jan 29 2018Feb 1 2018


ConferenceFiber Lasers XV: Technology and Systems 2018
CountryUnited States
CitySan Francisco


  • all-solid fibers
  • aperiodic design
  • fiber amplifier
  • Fiber laser
  • large pitch fibers
  • mode instability
  • photonic crystal fibers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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