written 5.2 years ago by
teamques10
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modified 5.2 years ago
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FUSION splicing:
It is accomplished by applying localized heating i.e by a flame or an electrical arc at an interference between
two butted, pre aligned fiber ends.
The figure shown below:
- This technique involves heating of two prepared fiber ends to their fusing point by applying sufficient axial
pressure between the two optical fibers.
- For heating most widely source is electric arc.
- Following are steps for fusion process
- PREFUSION: It is a technique, which involves the rounding of the fiber ends with a low energy discharge
before pressing the fibers together.
- By moving movable block, with proper pressure two fibers are pressed together
- Then there will be accomplishment of splice.
MECHANICAL splicing:
- Using rigid alignment tube.
- In this method accurately produced rigid alignment tube is used to bond the prepared fiber ends permanently
- Figure shows the snug tube splicing.
- In snug tune splicing technique uses a glass or ceramic capillary tube with an inner diameter just large enough
to accept the optical fibers.
- Transparent adhesive is injected through a transverse bore in capillary to give mechanical sealing and index
matching of the splice.
- Average insertion losses as low as 0.1dB have been obtained
- Figure shows the loose tube splice.
- In this splice an oversized square section metal is used to accept the prepared fiber ends.
- Transparent adhesives are first inserted into the tube followed by the fibers.
- The splice is self-aligned, when fibers are curved in a same plane.
- Mean splice insertion losses of 0.73dB have been achieved.