Installation Instructions

Installation
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N okia Proprietary and C o n f idential I ssue 2 D RAFT 1 - en Status
Fusion splicing
In fusion splicing the ends of the fibres are aligned either manua
manipulators and a microscope system for viewing the splice, or au
t
either using cameras or by measuring the light transmitted through
adjusting the positions of the fibres to optimise the transmission
.
The ends of the fibre are then melted together using a gas flame o
r
commonly an electric arc.
There are two types of fusion splicing methods in use throughout t
h
today:
• Mass fusion
• Single fusion.
Mass fusion splicing is for splicing multiple fibres, such as ribbo
n
in one operation
Single fusion splicing joins the fibres one at a time.
Near perfect splices can be obtained with losses as low as 0.02 dB
mechanical splice 0.2 dB).
Fusion splices give very low back reflections and are preferred fo
fibres.
Fusion splicing uses expensive equipment and provides cheap splice
s
mechanical splicing uses less expensive equipment but provides mor
e
splices.
5.6.3 Splicing defects
Splicing defects are illustrated in Figure
Figure 19. Splicing def ects