Note: When different fiber (different in diameter) or multimode fiber splicing, maybe
there will appear an upright line at the junction point, we call it “weld line”, this won’t
affect splicing quality (splice loss and splice strength).
33
Appendix A:
The reasons of high splicing loss and its solutions
Phenomenon
Name
Fiber core axial
direction skewing
Reason
Solution
There exists dust in V groove
or fiber pressure hammer.
There exists dust in V groove
or fiber pressure hammer.
Clean the V groove and fiber
pressure hammer.
Clean the V groove and fiber
pressure hammer
Poor quality on fiber end face
Check the fiber cutting knife
to make sure whether it’s in
good working condition.
Discharging current strength
is too lo w.
Gain the discharging current
strength and discharging time.
Error in fiber
core angle
Mode field
diameter
mismatch.
Dust in V-Groove or in fiber
press hammer.
Clean the V-groove and fiber
press hammer
Poor quality on fiber end face
Check the cutting knife to see
whether it is in good working
condition.
Error in
core angle
Poor quality on fiber end face
Check the fiber cutting knife to
make sure whether i t’s in
good working condition.
Prefusing discharging current
strength is low or the prefusing
splicing time is short.
Gain the discharging current
strength and discharging time.
Fiber core
bending
Poor quality on fiber end face
Check the fiber cutting knife to
make sure whether it ’s in
good working condition.
Prefusing discharging current
strength is low or prefusi ng
discharging time is short.
Gain the discharging current
strength and discharging time.
Bubble
Dust burn
Increase“Discharging strengt
h”
or“Discharging time”.
Mode field
diameter
mismatch
Impelling strength is too low.
Do [electrical machine alignmen
t]
maintenance.
Prefusing discharging current
strength is high or prefusing
discharging time is long.
Reduce the discharging current
strength and discharging time.
Fiber being
separated
Impelling strength is too high.
Reduce [overlap degree] and
do [electrical alignment]
maintenance.
Too thick
Inappropriate discharging
current strength .
Some discharge parameters
are improper.
Execute [discharging alignment]
Adjust [prefusing discharging
current strength] or increase
[[overlap ]
Too thin
