Thermo-optical effects in Tm-doped large mode area photonic crystal fibers

Carlo Molardi, Enrico Coscelli, Annamaria Cucinotta, Stefano Selleri

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

1 Citation (Scopus)


Designs of Tm-doped photonic crystal fibers for laser operation must take in account the strong thermo-optical effects due to the Tm quantum defect and the consequent corruption of the single mode guiding properties. A new fiber design with a ∼ 80 μm core diameter, based on the cladding mirror symmetry reduction is proposed and analyzed using a full-vector FEM-based modal solver. The thermal effects are investigated using a computationally efficient model. A large pitch fiber with similar core diameter, which represents the actual state-of-art of Tm-doped laser technology, has been investigated in order to have a basis of comparison. Optimizing some key parameters of the new symmetry free fiber, the possibility to achieve a wide band single mode operation under an heavy heat load of over 300 W/m is demonstrated. In particular a very high modal discrimination value larger than 0.5 is obtained.

Original languageEnglish
Title of host publicationFiber Lasers XI
Subtitle of host publicationTechnology, Systems, and Applications
ISBN (Print)9780819498748
Publication statusPublished - Jan 1 2014
Externally publishedYes
EventFiber Lasers XI: Technology, Systems, and Applications - San Francisco, CA, United States
Duration: Feb 3 2014Feb 6 2014

Publication series

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


ConferenceFiber Lasers XI: Technology, Systems, and Applications
CountryUnited States
CitySan Francisco, CA


  • Large mode area photonic crystal fibers
  • Reduced symmetry cladding
  • 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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