M90 Fusion Splicer 5-6 Operating Instructions
Attenuation Splice Issue 02/97
Parameter re-
commendations
for different fiber
types
The parameter settings suggested here have been tried and tested with fibers from
different manufacturers. If you are unable to obtain satisfactory results, proceed as
described in section "Possible Problems".
The default parameters stored in the fusion splicer provide the basis for all parameter
settings. These correspond to the values in the "Standard Single-Mode Fiber" column in
the following table. You can set all default parameters simultaneously by holding button
depressed while you switch on the splicer. Note, however, that this will overwrite the
parameters you have also set for the other fusion programs.
Fiber Type
Parameter
Standard Single-
Mode Fiber
Depressed
Inner Cladding
Dispersion-Shifted
Single-Mode Fiber
Cleaning current 14.5 mA 14.5 mA 14.5 mA
Cleaning time 0.1 s 0.1 s 0.1 s
Attenuation value 0 to 10 dB 0 to 10 dB 0 to 10 dB
Z-gap 7.0 µm 7.0 µm 7.0 µm
Autofeed 5.0 µm 5.0 µm 5.0 µm
Prefusion current 15 mA 15 mA 15 mA
Prefusion time 0.25 s 0.25 s 0.25 s
Fusion current 14.5 mA 14.5 mA 14.5 mA
Min. fusion time 1.0 s 1.0 s 1.0 s
Max. fusion time 10.0 s 10.0 s 10.0 s
Additional time 0.15 s 0.15 s 0.15 to 0.18 s
Lead 30 % 45 % 65 %
Parameter setting
for special fiber
types
If the fiber type you are using needs parameters which deviate substantially from the
default parameters (even for normal splicing), determine suitable parameters as follows:
- Use the
Automatic Fusion Time
program to determine the parameters for obtain-
ing good splice losses. The fusion current should be selected so that the displayed
fusion time lies between 2 s and 4 s.
- Set the same parameters in the
Attenuation Splice
program.
- Set the required value for the attenuation.
- Reduce the fusion current by 1 mA.
- Set the lead to 30 % and the additional time to 0.15 s.
- Make an attenuation splice with these parameters.
- If you do not get satisfactory results, proceed by using the check list set out in sec-
tion "Possible Problems".
Dependency of
the parameters
on the required
attenuation
If the parameters have been correctly set for the given fiber type, you should always get
good results irrespective of the attenuation value selected. Only in a few particularly
unfavorable cases may it be necessary to correct the lead to suit the selected attenua-
tion.
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