Splicing Multimode Fiber To Single-Mode Fiber - Cailabs Aroona Star Instruction Manual

7. Check cleave quality on the optical fusion splicer control
screen. The fiber end should be straight and free of any
defect, ridge or crack. Cailabs recommends a cleave
angle below 2° to insure optimal fusion splicing. If cleave
quality is unsuitable start again at step 4.
8. If the splicer has several alignment modes to choose from,
it is recommended you select the "MMF auto" program with
clad to clad alignment.
9.
Launch the splicing procedure. Check the splice quality on
the screen. If quality is unsuitable start again from step 2.
10. Once the splice quality is suitable gently remove both fibers
from the optical fusion splicer.
11. Place the protection sleeve over the splice, covering the
whole bare fiber area.
12. Place the protection sleeve in the optical fusion splicer oven
and launch the automatic oven program. The protection
sleeve is thermoretractable and protects and strengthen
the bare spliced fiber.
13. Cailabs supplies collars, clips, adhesive pads and coiling
tapes, so that the splice protectors can be properly secured
in the customer's drawer; the installer will choose which of
these supplies to use based upon the configuration of the
drawer and available space.
14. Close the distribution rack. If there is excess optical fiber at
the AROONA-STAR rack output, coil it and use the plastic
straps to fix it to the distribution rack. Be sure not to apply
any stress to the fibers: do not overtighten the collars, the
fiber must be able to slide around a bit without being forced.
C. Splicing multimode fiber to
single-mode fiber
In the case of a link between 400 m and 800 m, the connector at
the end of link must be replaced with a single-mode connector,
generally using a single-mode pigtail. Therefore a single-mode
to multimode fusion splice must be operated.
Most of splicing equipment do not have a dedicated program
to this end. However, a MMF-to-MMF auto-alignment can be
used, as cladding diameter of single-mode fibers and multimode
fibers are similar (125 µm).
Due to observation through complex glass structure, you might
not be able to distinguish single-mode fiber from multimode
fiber, as shown in the opposite photo.
A "bubble in the fiber" error is generally reported after the
fusion is completed, even if the fusion quality is compliant. Do
not take it into account, unless an actual bubble is observed on
the control screen, as shown in the previous section. Acceptance
criteria are the same as for a standard MMF-to-MMF fusion
splice.
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