Modal decomposition technique for multimode fibers.
We propose a new solution for modal decomposition in multimode fibers, based on a spectral and spatial imaging technique. The appearance of spurious modes in the spectral and spatial processing of the images at the output of the fiber under test when it has more than two modes is demonstrated theoretically. The new method, which allows us to identify spurious modes, is more accurate, simpler, and faster than previously reported methods. For demonstration, measurements in a standard step-index multimode fiber and a small-core microstructured fiber are carried out successfully.
Université Européenne de Bretagne, France/CNRS (UMR6082) Foton, Lannion, France. dnguyen@enssat.fr
Duc Minh
DM
Nguyen
Stéphane
S
Blin
Thanh Nam
TN
Nguyen
Sy Dat
SD
Le
Laurent
L
Provino
Monique
M
Thual
Thierry
T
Chartier