Precise Measuring Test Bed for Characterization of Mode Field Distribution in Different types of Multimode Fibers
Typ dokumentu
stať ve sborníkuconference paper
Peer-reviewed
publishedVersion
Autor
Bohata J.
Němeček T.
Komanec M.
Zvánovec S.
Kormaňák P.
Beran J.
Brouček J.
Práva
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In this paper we present experimental results from
precise measurements of mode field distribution in various
commercial multimode (MM) fiber types. We characterize the
mode field distribution by the encircled flux (EF) parameter. EF
determines optimal launch conditions in the core of the MM fiber,
which is crucial especially for accurate characterizing of insertion
losses at fiber connections, e.g. in data centers. For the purpose of
EF measurement, a universal testbed enabling mode field
characterization, integral optical power estimation or fiber
connector cleanness evaluation has been proposed and
experimentally verified. The uniqueness of the proposed testbed
lies in backlighting of the tested MM fiber. This backlighting
enables accurate positioning of the MM fiber end-face with the
collimating lens to measure in the near-field area. The testbed
allows the deployment of variable MM fibers and is also
wavelength independent. Therefore it has the high potential within
growing usage of plastic or large core fibers for short-range
communications, e.g. in automotive or avionics. The obtained
results are discussed within a selected real application. Moreover,
since the mode field distribution is evaluated even for fibers, which
do not have available any standards for EF characterization, we
present new recommendations for optimal launch conditions in
such fibers.
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Kolekce
- Publikační činnost ČVUT [1369]