Thermo-optical behavior of rare-earth-doped low-NA fibers in high power operation.
The influence of the internal temperature gradient in rare-earth-doped low-numerical-aperture fibers on modal properties is analyzed for step-index and photonic crystal fibers. We provide guidelines when a single-mode fiber turns into a multimode fiber and how the mode-field-diameter is affected.
Hädrich
S
S
Schreiber
T
T
Pertsch
T
T
Limpert
J
J
Peschel
T
T
Eberhardt
R
R
Tünnermann
A
A