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 SPECIFICATIONS UNITS Attenuation at 1310nm < 0.38 dB/km Attenuation at 1550nm < 0.25 Attenuation at 1285- 1330nm < 0.4 Mode field Diameter 8.8-9.8 microns Point discontinuity < 0.1 dB Cut-off wavelength 1160 – 1310 nm

OPTICAL PARAMETERS -ITU-T G 655 SPECIFICATIONS UNITS Attenuation at 1550nm < 0.25 dB/km Attenuation at 1625nm Attenuation at 1383± 3 nm < 1.0 Mode field Diameter 9.2-10 microns Point discontinuity at 1550nm < 0.1 dB Cut-off wavelength <1260 nm

DISPERSION –ITU-T G 652 PARAMETERS SPECIFICATIONS UNITS 1270 -1340nm band < 5.3 ps/nm.km 1285 -1330nm band < 3.5 1550 nm < 18 Slope < 0.092 ps/nmsq.km Zero Dispersion wavelength 1300 - 1320 nm PMD at 1310 & 1550 < 0.2 ps/sqrt.km

DISPERSION –ITU-T G 655 PARAMETERS SPECIFICATIONS UNITS 1530nm >0.1 ps/nm.km 1565nm 4 - 6 1565 - 1625 nm 4 – 11.2 Slope < 0.08 ps/nmsq.km PMD at 1550 < 0.2 ps/sqrt.km

Geometrical Parameters –ITU-T G 652 SPECIFICATIONS UNITS Mode field Concentricity error < 0.8 microns Mode field non circularity < 12 % Clad Diameter 125 ± 1 Clad non circularity < 1 % Coat Diameter 245±10

Geometrical Parameters –ITU-T G 655 SPECIFICATIONS UNITS Mode field Concentricity error < 0.5 microns Mode field non circularity < 12 % Clad Diameter 125 ± 1 Clad non circularity < 1 % Coat Diameter 245±10

Mechanical Parameter –ITU-T G 652 PARAMETERS SPECIFICATIONS UNITS Proof Test 1 % Fibre Curl 4 M Dynamic Fatigue 20 Static Fatigue Stripping Force 1.3 – 9.8 N

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

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

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

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

Optical Test - OFC 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

CABLE CONSTRUCTIONS

[Cable Designs] UNITUBE BURIAL CABLE MULTITUBE BURIAL CABLE OUTER SHEATH (NYLON) STRENGTH MEMBER(ARAMID YARN) INNER SHEATH (HDPE) OPTICAL FIBRE IN LOOSE TUBE STRENGTH MEMBER (GI WIRE) MULTITUBE BURIAL CABLE OUTER SHEATH (HDPE) CCST ARMOUR INNER SHEATH (HDPE) FLOODING JELLY CENTRAL STRENGTH MEMBER (FRP) OPTICAL FIBRE IN LOOSE TUBE

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

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

48F METAL FREE OPTICAL FIBRE CABLE Loose Tube FRP Rod Thixotropic jelly Flooding Jelly Polyester Tape GFR Yarns Rip Cord HDPE PA-12

48F METAL FREE OPTICAL FIBRE CABLE 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 % * : Typical values which may vary as per Customer Spec

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