Improved large-mode-area endlessly single-mode photonic crystal fibers.
We numerically study the possibilities for improved large-mode-area endlessly single-mode photonic crystal fibers for use in high-power delivery applications. By carefully choosing the optimal hole diameter, we find that a triangular core formed by three missing neighboring air holes considerably improves the mode area and loss properties compared with the case with a core formed by one missing air hole. In a realized fiber we demonstrate an enhancement of the mode area by approximately 30% without a corresponding increase in the attenuation.
Mortensen
N A
NA
Crystal Fibre A/S, Blokken 84, DK-3460 Birkerød, Denmark. nam@crystal-fibre.com
Nielsen
M D
MD
Folkenberg
J R
JR
Petersson
A
A
Simonsen
H R
HR