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Proceedings Paper

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

Innovative Photonic Crystal Fibers (PCF) with optimized air-hole matrix, designed to break the C6ν 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.

Paper Details

Date Published: 2 May 2014
PDF: 6 pages
Proc. SPIE 9128, Micro-structured and Specialty Optical Fibres III, 912808 (2 May 2014); doi: 10.1117/12.2051624
Show Author Affiliations
Enrico Coscelli, Univ. degli Studi di Parma (Italy)
Carlo Molardi, Univ. degli Studi di Parma (Italy)
Federica Poli, Univ. degli Studi di Parma (Italy)
Annamaria Cucinotta, Univ. degli Studi di Parma (Italy)
Stefano Selleri, Univ. degli Studi di Parma (Italy)


Published in SPIE Proceedings Vol. 9128:
Micro-structured and Specialty Optical Fibres III
Kyriacos Kalli; Alexis Mendez, Editor(s)

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