Abstract
Bending-loss insensitive fibers (BIFs) have been receiving increasing
attention with a view to improving FTTH network installation and
maintenance. Several BIFs have been proposed and developed to realize a
lower bending loss, and hole-assisted fiber (HAF) can realize both excellent
bending loss characteristics and other properties compatible with
conventional single-mode fiber (SMF). In this paper, we numerically clarify
a design that provides both an allowable bending radius of 5 mm and other
properties comparable to conventional SMFs. The calculated results also
reveal the much wider single-mode bandwidth of HAF with both a low bending
loss and a comparable MFD to that of SMF. We then discuss the applicability
of HAF based optical cord for short-length transmission and reveal the
sufficiently low multi-pass interference (MPI) characteristics of
single-mode HAF, which are independent of the existence of a mode field
diameter (MFD) mismatch. Although a large MFD mismatch degrades the MPI
characteristics of HAF with a longer cut-off wavelength, we reveal a way to
improve the MPI for such a HAF by utilizing the sweep fusion splicing
technique.
© 2011 IEEE
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