Optical Fiber Structure, color coding, Jointing / Splicing

techniques, Losses and Safety precautions

STRUCTURE OF 18 FIBER OLEX CABLE

There are 12 parts from outer to inner of cable.

Polyethylene sheath, steel armoring wire. Polyethylene

sheath, ethylene acrylic copolymer bedding, corrugated

zetabon, 5262 steel tape armor, ethylene acrylic copolymer

bedding, polyethylene sheath, polyester tape, polyethylene

slotted core, 18 single mode UV acryl ate coated fibers,

moisture resistance jelly and FRP

COLOR SCHEME OF OLEX CABLE

There are six slots Slot no. one between two red lines Slot no. three has single red line There are four fibers in each slot except slot no. three and

six There are two fibers in slot no. three and slot no. six is

empty. The color of fibers are white, blue, orange and green

Color scheme of 24 fibers loose tubes

There are six tubes The color of tubes are blue, orange. Green and remaining

are white/yellow Each tube has 4 fibers The color of fibers are blue, orange, green and brown

Color scheme of 48 fibers loose tubes

There are six tubes The color of tubes are blue, orange. Green, brown, slate

and white Each tube has 8 fibers The color of fibers are blue, orange, green Brown, Slate,

white, Red and black

Color scheme of 96 fibers loose tubes

There are eight tubes The color of tubes are blue, orange. Green,

brown, slate, white, Red and Black Each tube has 12 fibers The color of fibers are blue, orange, green

Brown, Slate, white, Red, black, yellow, violet, Pink and Aqua.

The last four color may be Yellow, Gray, Violet and Aqua

JOINTING OF OPTICAL FIBER CABLE

Cable preparation

End cap preparation

Fusion splice

Joint enclosure

Connectors

TYPES OF SPLICING

Fusion splicing of Optical Fiber Mechanical Splicing of Optical Fiber• V-block Splice• Precision drilled tubes• Three rods splice• Fiber ribbon splice• The AT&T CSL Light Splice Semi permanent splice• Connectors• Pig tail• Patch cord

SPLICING TOOLS

Name of various splicing tools and their uses Stripper is used to remove plastic jacket from fiber Cleaver is used for cutting the fiber Container is used for cable off-cuts Garret is used for circumferential cutting of sheath Measuring tape is used to measure the length of cable No nick tripper is used to remove the plastic from the

pig tail.

SPLICING TOOLS

Hacksaw is used to cut steel wire armoring Somi off-cut is used to cut pig tail fiber Acetone is used to clean the fiber Pocket knife is used for miscellaneous used

How fiber optics in Access help

PROVIDES:

High bandwidth architecture by bringing fiber into the access

network

Cost effective bandwidth

Noise isolation

Security

Reliability

Reduce OPEX and CAPEX

Small physical presence

Active network

LOSSES IN OPTICAL FIBER

Material Loss: Atomic Defects in Glass composition Impurities of metal ions Electronic absorption bands in the ultra-violet region Atomic vibration bands in the near infrared region Intrinsic absorption

SCATTERING IN OPTICAL FIBER

Microscopic variation in the material density Material defects occurring during fiber manufacture Rayleigh Scattering decreases dramatically with the

increase of wave length Radiation losses

DISPERSION

Inter Modal Dispersion Intra Modal Dispersion

• Material Dispersion

• Wave Guide Dispersion

Safety Precautions

Hazard with LASER.

Don’t use viewing aids when fiber is connected with Optical source.

Take notice of LASER warning sings. Use glasses during treatment with LASER

Safety Precautions

Handling with Bare Fiber:

Never touch the end of Bared fiber Proper dispose of fiber off-cuts. Always wash your hands thoroughly after handling with

fiber. Don’t eat, drink and smoke near OF work station

Safety Precautions

Hazard with Chemicals:

All cleaning chemical are highly flammable and should not be used near heat and open flame