Double-cladding photonic crystal fibers with reduced cladding symmetry for Tm-doped lasers

Enrico Coscelli, Carlo Molardi, Federica Poli, Annamaria Cucinotta, Stefano Selleri

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


Innovative Photonic Crystal Fibers (PCF) with optimized air-hole matrix, designed to break the C6v symmetry of the inner cladding while preserving their feasibility through the well-established stack-and-draw technique, are presented. The possibility to provide stable SM guiding at λ = 2 μm with core diameter up to 80 μm and a coupled pump power exceeding 300 W is analyzed by means of a full-vector modal solver based on the finiteelement method with embedded thermal model, to account for the effects of heating on the mode confinement. Simulation results have shown this approach is effective in providing modal discrimination, allowing selective amplification of the sole fundamental mode due to the delocalization of the high-order modes with mirrorsymmetric field distributions. Effective suppression of the high-order modes under a heat load of 340 W/m, while keeping an effective area exceeding 2500 μm2 has been demonstrated.

Original languageEnglish
Title of host publicationMicro-Structured and Specialty Optical Fibres III
ISBN (Print)9781628410761
Publication statusPublished - Jan 1 2014
Externally publishedYes
EventMicro-Structured and Specialty Optical Fibres III - Brussels, Belgium
Duration: Apr 14 2014Apr 15 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceMicro-Structured and Specialty Optical Fibres III


  • Photonic crystal fibers
  • thermal effects
  • Thulium-doped 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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