This paper reviews characterization techniques for few mode fibers and components. The
focus is on interferometric techniques including spatial and spectral resolved imaging (S 2) …

We have fabricated an air-cladded mode-group selective photonic lantern, which can (de)
multiplex the first two mode groups of a standard two-mode step-index fiber. Instead of …

The fabrication steps for an air-clad photonic lantern that can excite the first two LP mode
groups in a multimode fiber are presented in this paper. A multiplexing crosstalk below …