Single-mode regime of 19-cell Yb-doped double-cladding photonic crystal fibers

Enrico Coscelli, Federica Poli, Thomas T. Alkeskjold, Davide Passaro, Annamaria Cucinotta, Stefano Selleri, Lasse Leick, Jes Broeng

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

The single-mode regime of 19-cell Yb-doped double-cladding photonic crystal fibers, successfully exploited for high-power applications due to their large mode area, has been studied. The first higher-order mode cut-off wavelength has been evaluated taking into account the crossing between its dispersion curve, obtained with a full-vector modal solver based on the finite element method, and the one of the fundamental space-filling mode, calculated for an infinite cladding. Moreover, the overlap integral on the doped core of the higher-order mode at cut-off condition has been calculated, in order to investigate its effective suppression in the gain competition with the fundamental mode, by applying a spatial and spectral amplifier model. 19-cell double-cladding photonic crystal fibers with different core diameter and refractive index values have been considered. Simulation results have shown that the approach based on the fundamental space-filling mode effective index is not suitable for the cut-off analysis of large core fibers with a finite cladding dimension.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Volume7914
Pages (from-to)79141V
Number of pages7
ISSN0277-786X
DOIs
Publication statusPublished - 2011
Externally publishedYes
EventSPIE Photonics West : Fiber Lasers VIII: Technology, Systems, and Applications - San Francisco, California, United States
Duration: 22 Jan 2011 → …

Conference

ConferenceSPIE Photonics West : Fiber Lasers VIII: Technology, Systems, and Applications
CountryUnited States
CitySan Francisco, California
Period22/01/2011 → …

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