  We present broadband group velocity dispersion (GVD) measurements of
commercially available ultra-high numerical aperture fibers (UHNA1, UHNA3,
UHNA4, UHNA7 and PM2000D from Coherent-Nufern). Although these fibers are
attractive for dispersion management in ultrafast fiber laser systems in the 2
{\mu}m wavelength region, experimental dispersion data in literature is scarce
and inconsistent. Here we demonstrate the measurements using the spectral
interferometry technique covering the typically used erbium, thulium and
holmium emission bands. The results are characterized in terms of the
standard-deviation uncertainty and compared with previous literature reports.
Fitting parameters are provided for each fiber allowing for the straightforward
replication of the measured dispersion profiles. This work is intended to
facilitate the design of ultrafast fiber laser sources and the investigations
of nonlinear optical phenomena.
