USHAMARTIN CABLE DIVISION

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OPTICAL FIBRE CABLE
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OFC Manufacturing process flow
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Testing of Optical fibre Cables

• Optical Tests
• Physical parameters
• Mechanical Tests
• Environment Tests

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OPTICAL PARAMETERS -ITU-T G 652
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OPTICAL PARAMETERS -ITU-T G 655
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DISPERSION ITU-T G 652
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DISPERSION ITU-T G 655
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Geometrical Parameters ITU-T G 652
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Geometrical Parameters ITU-T G 655
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Mechanical Parameter ITU-T G 652
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Testing of Optical Fibres
1. Mode field diameter
2.   Clad diameter 3.   Clad non
circularity / Ovality 4.   Mode field
concentricity error 5.   Diameter over
primary coated fibre 6.   Attenuation and
Spectral attenuation 7.   Chromatic
dispersion 8.   Polarization mode
dispersion 9.   Cut-Off Wave length
10.  Microbend test on mandrel
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Mechanical Test - I OFC

•     Tensile Strength Test
•      Abrasion Test
•      Crush Test
•      Impact Test
•      Repeated Bend Test
•      Torsion Test
•      Kink Test
•       Cable Bend Test

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Mechanical Test II OFC

• Static bend 
• Water Penetration Test
• Drip Test
• Embrittlement Test of loose tube
• Kink resistance test on loose tube
• Drainage test of loose tube
• Check for easy removal of sheath
• Effect of aggressive media on the cable jacket
• Flexural Rigidity 
• Figure 8 test

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Physical Environmental Test - OFC

• Sheath Thickness
• Cable Diameter
• Cable performance from 40 to 70 deg C

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Optical Test - OFC

• Attenuation at 1310nm
• Attenuation at 1550nm
• Attenuation at 1625nm for ITU-T G 652 Fibre
• Point discontinuity at 1550nm
• Optical Length of cable
• PMD of cables fibre
• Chromatic dispersion

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CABLE CONSTRUCTIONS
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Cable Designs
UNITUBE BURIAL CABLE
OUTER SHEATH (NYLON)
STRENGTH MEMBER(ARAMID YARN)
OPTICAL FIBRE IN LOOSE TUBE
STRENGTH MEMBER (GI WIRE)
MULTITUBE BURIAL CABLE
FLOODING JELLY
CENTRAL STRENGTH MEMBER (FRP)
OPTICAL FIBRE IN LOOSE TUBE
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Cable Designs
UNITUBE DUCT CABLE
MULTITUBE DUCT CABLE
WATER SWELLABLE TAPE
OPTICAL FIBRE IN LOOSE TUBE
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Cable Designs
Premises Distribution Cable PDC
OUTER JACKET (LSOH)
OPTICAL FIBRE IN LOOSE TUBE
ARAMID YARN
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48F METAL FREE OPTICAL FIBRE CABLE
Optical Fibre
Loose Tube
FRP Rod
Thixotropic jelly
Flooding Jelly
Polyester Tape
GFR Yarns
Rip Cord
HDPE
PA-12
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48F METAL FREE OPTICAL FIBRE CABLE
Typical values which may vary as per Customer
Spec
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48 FIBRE DUCT OFC ( RIBBON TYPE )
12 Fibre Ribbon
Thixotropic Jelly
Loose Tube
FRP Rod
Flooding Jelly
Polyester Tape
Rip Cord
HDPE Sheath
PA-12 Jacket