Splicing & Splicing Machine prepared & presented by Rahat Azim Chowdhury for Grameen Phone Technical...

8/13/2019 Splicing & Splicing Machine prepared & presented by Rahat Azim Chowdhury for Grameen Phone Technical Division.

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SPLICING & SPLICING MACHINE

An Overview

Prepared By : Rahat Azim Chowdhury

Junior Researcher (R & D)Genesis Technologies Ltd.


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Overview

Splicing can be defined as thejoining of two conductors or fibers

together to restore the conductor continuity between two points.

Once a splicing is done the spliced point needs to have mechanical

protection which is provided by Protection Sleeves, namely Smouv.

Once all of the conductors have been spliced they will are inserted into

the Splice EnclosureNamely Jointing Kitthat protects the splicing

point from environmental hazards, mechanical stress, unstabilized

bending radii.


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Splicing Methods

Fusion Splicing

Fusion splicing is the recommended methodof fusing two fibers together.

In a fusion-splice, the two fibers are "welded" together with an electric arc.

Because this method of splicing is much more accurate there may be no loss acrossthe splice. Fusion splicing is the only type of splicing recommended for single-modefiber.

Mechanical Splicing

A typical mechanical splice uses a gripping mechanismto prevent fiber separation, ameans for fiber alignment, and includes index matching gelto reduce signal loss.

As of present times, fusion splice is much practicabledue to

Low splice-loss High accuracy

High durability

Increasing number of fiber cores in a single fiber

Less tolerable downtime on high capacity network demand.


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Principle of Fusion Splicing

The objective of fusion splicing is to join optical fiber with low splice

loss, low reflection, high mechanical strength and long-term stability

y

z

fiber 2

electrode

fiber 1

electric arc

core

claddingcoating

electrode

alignment

alignment

z

x


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Basic Requirements for a High-quality Fusion Splice

Clean working area and tools (stripper, cleaver, fusion splicer)

Good fiber quality or suitable fusion splicer type

Good fiber preparation

Strip coating to expose cladding (bare fiber)

Clean stripped fiber end

Cleave fiber end to required length

Good alignment

Correct placement of fiber ends in fusion splicer

Precise alignment by fusion splicer

Suitable fusion parameters

Stabile fusion arc; compensation of environmental influences etc.

Good splice protection


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Influence on Fusion Process: Self-Centering Effect

Caused by the tendency of the fiber

to form a homogeneous joint as aresult of the surface tension of the

molten glass

Leads to compensation / decrease of

fiber offsets during fusion

For this reason fusion splicers with

fixed v-grooves can achieve average

splice losses of less than 0.05 dB if

core eccentricity is low (e.g. ccc 0.03 dB),

Go for fusing again by selecting up/down button

Checking out Splice Loss Running Tensile Test


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Step-3

Then Lift up the RIGHT SIDEFlaps

In the same way done for left side.

Take the spliced fiber out of the

Groove by softly holding the fiber

at both ends.

Step-2

Then Lift the CENTRAL FLAPup keeping

The fiber at left side still held gently

Practice Softness, Patience & care

While lifting up the CENTRAL FLAP

Step-1

Gently lift up the LEFT SIDEClamping

Flap and then the LID flap.

While lifting up the flaps, make sure

That the fiber on the LEFT side is

softly & gently held for better

Control & protection of fiber

Removing Spliced Fiber from Machine


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Mechanical Protection of Splice Point

The Spliced point can be broken easily by any radial force and therefore must be protected.

For field splicing there are two common methods:

Heat-shrinking protector:

There is a heat-shrinking oven installed at the rear part of the splicer.

Open the oven transparent flap and place the splice inside. Make sure the fiber is lying straight,

the sleeve is in the center and covers both coating ends. A LED will light up signals that the oven is heating up. When the LED goes off, visually check

that the sleeve has been shrunk down evenly and remove the splice from the oven.

Crimping:

In case of heat-shrinking protection, If crimping protection is applied, place the v-shapedaluminum clip with the opening

showing upwards into the crimping tool which is installed at the rear of the splicing machine.

Place the fiber loop with the exposed cladding section straight and evenly inside the clip and

apply the crimping lever to close the protector. Remove the fiber loop then.


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ThanksPrepared & Presented By :Rahat Azim Chowdhury

Junior Researcher (R & D)

Genesis Technologies Ltd.

Splicing & Splicing Machine prepared & presented by Rahat Azim Chowdhury for Grameen Phone Technical...

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