Title :
Single-Mode Regime in Large-Mode-Area Rare-Earth-Doped Rod-Type PCFs
Author :
Poli, Federica ; Cucinotta, Annamaria ; Passaro, Davide ; Selleri, Stefano ; Laegsgaard, Jesper ; Broeng, Jes
Author_Institution :
Univ. of Parma, Parma
Abstract :
In this paper, large-mode-area, double-cladding, rare-earth-doped photonic crystal fibers are investigated in order to understand how the refractive index distribution and the mode competition given by the amplification can assure single-mode propagation. Fibers with different core diameters, i.e., 35, 60, and 100 mum, are considered. The analysis of the mode effective index, overlap, effective area, gain, and power evolution along the doped fiber provides clear guidelines on the fiber physical characteristics to be matched in the fabrication process to obtain a truly or effectively single-mode output beam.
Keywords :
doping profiles; fibre lasers; holey fibres; laser beams; laser modes; light propagation; optical fibre cladding; optical materials; photonic crystals; rare earth metals; refractive index; fabrication process; optical double-cladding; photonic crystal fibre; rare-earth-doped rod-type PCF; refractive index distribution; single-mode output beam; single-mode propagation; single-mode regime; size 100 mum; size 35 mum; size 60 mum; Fiber lasers; Guidelines; Laser beams; Manufacturing; Optical fiber devices; Photonic crystal fibers; Photonic crystals; Polymers; Refractive index; Thermal conductivity; Photonic crystal fibers (PCFs); rare-earth-doped fibers; rod-type fibers; single-mode regime;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2008.2010265
