January 2016
Beginner
170 pages
6h 22m
English
Content preview from Optoelectronic Line Transmission
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54 Optoelectronic
Line
Transmission
fibres to be used at high
temperatures
(up to
200°C),
while
metallic coatings can make fibre sensors respond
more strongly to magnetic fields and
pressures
[13].
One
of the problems of making a fibre in this manner is
an undesirable dip in refractive index produced within
the central core region. This is the direct
result
of the in-
tense
heat
required for the collapsing and fibre drawing
stages for
heat
causes the germanium dioxide core
dopant to be evaporated away from the tube's inner
sur-
face.
In multimode fibres, the refractive index dip can
cause reduced coupling
efficiency,
reduced bandwidth
and measuremen ...
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