Ericsson FSU 995 F - Splicing Process

28
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Prefusion
Cleaning
Current
Splicing process
C
Splicing processes represent a way of dividing splicing pro-
grams into groups according to the way the splicer carries
out the splicing sequence. The FSU 995 FA is organized
around six splicing processes:
l Normal splicing...............................................................28
l Hot core alignment......................................................... 29
l Small core alignment .....................................................30
l Mode field matching ......................................................31
l Attenuator making ..........................................................34
l Pulling or tapering...........................................................35
The following descriptions will outline the special operations
and considerations involved with each splicing process, as
well as, the necessary control parameters to run these opera-
tions (to read more about control parameters, see the section
on program parameters, p.36). Like the explanation of fiber
types, each description will be headed with a list of the pre-
defined programs that use the splicing process, and thus can
serve as a base for your own program.
ADVANCED OPERATION - Splicing program structure: Splicing process
Normal splicing
Pre-defined programs: 01-04, 10
The diagrams included
with the splicing pro-
cesses are actually two
superposed graphs. The
bar graph represents the
electrode currents with
respect to time. The line
graph represents the fiber
distance with respect to
time.
current 2
current 1
current 3
pre-fuse
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fiber distance
current
A typical splicing sequence for the normal splicing process
The normal splicing process is
suitable for standard single
and multimode fibers with a
core to cladding eccentricity
(ie. how much the core is not
centered in the fiber) of less
than 0.6 mm. There are no
special control parameters
associated with normal splic-
ing.
Real Time Control (RTC) procedure
RTC is a sub process used in some of the FSU 995 FA
splicing processes. It controls that the conditions set by
program parameters are fulfilled and then stops the appro-
priate splicing sequence. This is usually done by taking
and analyzing a number of hot images during the splicing
sequence.
The time it takes the FSU 995 to take a hot image and
analyze it is 0.2 seconds and is called an RTC cycle.
Real Time Control (RTC)
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