Inner cladding microstructuration based on symmetry reduction for improvement of singlemode robustness in VLMA fiber.
Very large mode area, active optical fibers with a low high order mode content in the actively doped core region were designed by removing the inner cladding symmetry. The relevance of the numerical approach is demonstrated here by the investigation of a standard air-silica Large Pitch Fiber, used as a reference. A detailed study of all-solid structures is also performed. Finally, we propose new kinds of geometry for 50 μm core, all-solid microstructured fibers enabling a robust singlemode laser emission from 400 nm to 2200 nm.
Xlim Research Institute, UMR CNRS / Université de Limoges n°7252, 123 avenue Albert Thomas, 87060 Limoges, France. romain.dauliat@xlim.fr
Romain
R
Dauliat
Dmitry
D
Gaponov
Aurélien
A
Benoit
François
F
Salin
Kay
K
Schuster
Raphaël
R
Jamier
Philippe
P
Roy