Multimode fiber devices with single-mode performance.
A taper transition can couple light between a multimode fiber and several single-mode fibers. If the number of single-mode fibers matches the number of spatial modes in the multimode fiber, the transition can have low loss in both directions. This enables the high performance of single-mode fiber devices to be attained in multimode fibers. We report an experimental proof of concept by using photonic crystal fiber techniques to make the transitions, demonstrating a multimode fiber filter with the transmission spectrum of a single-mode fiber grating.
Leon-Saval
S G
SG
Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK.
Birks
T A
TA
Bland-Hawthorn
J
J
Englund
M
M