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OPTICAL FIBRE CABLE

OPTICAL FIBRE CABLE. OFC Manufacturing process flow. Testing of Optical fibre Cables. Optical Tests Physical parameters Mechanical Tests Environment Tests. OPTICAL PARAMETERS -ITU-T G 652. OPTICAL PARAMETERS -ITU-T G 655. DISPERSION –ITU-T G 652. DISPERSION –ITU-T G 655.

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OPTICAL FIBRE CABLE

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  1. OPTICAL FIBRE CABLE

  2. OFC Manufacturing process flow

  3. Testing of Optical fibre Cables • Optical Tests • Physical parameters • Mechanical Tests • Environment Tests

  4. OPTICAL PARAMETERS -ITU-T G 652

  5. OPTICAL PARAMETERS -ITU-T G 655

  6. DISPERSION –ITU-T G 652

  7. DISPERSION –ITU-T G 655

  8. Geometrical Parameters –ITU-T G 652

  9. Geometrical Parameters –ITU-T G 655

  10. Mechanical Parameter –ITU-T G 652

  11. 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

  12. Mechanical Test - I OFC • Tensile Strength Test •      Abrasion Test •      Crush Test •      Impact Test •      Repeated Bend Test •      Torsion Test •      Kink Test •       Cable Bend Test

  13. 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

  14. Physical & Environmental Test - OFC • Sheath Thickness • Cable Diameter • Cable performance from –40 to + 70 deg C

  15. 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

  16. CABLE CONSTRUCTIONS

  17. [Cable Designs] INNER SHEATH (HDPE) OUTER SHEATH (HDPE) CCST ARMOUR INNER SHEATH (HDPE) 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

  18. [Cable Designs] OUTER SHEATH (NYLON) STRENGTH MEMBER ( FRP) INNER SHEATH (HDPE) OPTICAL FIBRE LOOSE TUBE OUTER SHEATH (NYLON) INNER SHEATH (HDPE) CENTRAL STRENGTH MEMBER (FRP) UNITUBE DUCT CABLE MULTITUBE DUCT CABLE WATER SWELLABLE TAPE OPTICAL FIBRE IN LOOSE TUBE

  19. [Cable Designs] Premises Distribution Cable [PDC] OUTER JACKET (LSOH) OPTICAL FIBRE IN LOOSE TUBE ARAMID YARN

  20. 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

  21. No. of Loose Tubes 6 Nos No. of Fibres per Loose Tube 8 Nos Colour of Loose Tubes Blue , Orange & Natural ( 4 Nos.) Colour of Fibres in Loose Tube Blue ,Orange , Green , Brown , Slate , White , Red & Natural Diameter of Cable 12.6 ± 0.5mm Weight of Cable 130 kg / km Packing Length 2 k.m ± 10 % 48F METAL FREE OPTICAL FIBRE CABLE * : Typical values which may vary as per Customer Spec

  22. 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

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