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Proceedings Paper

Comparison of thermally-induced single-mode regime changes in Yb-doped large mode area photonic crystal fibers
Author(s): Enrico Coscelli; Federica Poli; Riyadh Mwad Naife; Annamaria Cucinotta; A. Hadi Al-Janabi; Stefano Selleri
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Paper Abstract

Recently, the thermo-optic effect, which causes refractive index change in active optical fibers, emerged as one of the most limiting factor to power scaling of fiber lasers. The thermally-induced refractive index gradient in the fiber cross-section jeopardizes the extreme guiding properties required to obtain single-mode propagation in ultra Large Mode Area (LMA) fibers, eventually causing the rise of mode instabilities. In this paper the resilience to thermal effects of different rod-type Double Cladding Photonic Crystal Fiber designs, namely the 19-cell core, the distributed modal filtering and the large-pitch PCFs, have been compared through numerical simulations. The single-mode properties of each fiber have been obtained for different heating conditions. The causes of the different behavior have been investigated, providing a detailed overview of the influence of thermo-optical effects on the guiding properties of LMA PCFs, as well as some guidelines for the design of LMA PCFs for high-power applications.

Paper Details

Date Published: 3 May 2013
PDF: 7 pages
Proc. SPIE 8775, Micro-structured and Specialty Optical Fibres II, 87750N (3 May 2013); doi: 10.1117/12.2016858
Show Author Affiliations
Enrico Coscelli, Univ. degli Studi di Parma (Italy)
Federica Poli, Univ. degli Studi di Parma (Italy)
Riyadh Mwad Naife, Univ. of Baghdad (Iraq)
Annamaria Cucinotta, Univ. degli Studi di Parma (Italy)
A. Hadi Al-Janabi, Univ. of Baghdad (Iraq)
Stefano Selleri, Univ. degli Studi di Parma (Italy)


Published in SPIE Proceedings Vol. 8775:
Micro-structured and Specialty Optical Fibres II
Kyriacos Kalli; Jiri Kanka; Alexis Mendez, Editor(s)

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