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OPTICAL FIBRE CABLE. OFC Manufacturing process flow.

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Presentation on theme: "OPTICAL FIBRE CABLE. OFC Manufacturing process flow."— Presentation transcript:

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 PARAMETERSSPECIFICATIONSUNIT S Attenuation at 1310nm < 0.38dB/km Attenuation at 1550nm < 0.25dB/km Attenuation at nm < 0.4dB/km Mode field Diameter micron s Point discontinuity < 0.1dB Cut-off wavelength 1160 – 1310nm

5 OPTICAL PARAMETERS -ITU-T G 655 PARAMETERSSPECIFICATION S UNITS Attenuation at 1550nm < 0.25dB/km Attenuation at 1625nm < 0.25dB/km Attenuation at 1383± 3 nm < 1.0dB/km Mode field Diameter9.2-10microns Point discontinuity at 1550nm < 0.1dB Cut-off wavelength<1260nm

6 DISPERSION –ITU-T G 652 PARAMETERSSPECIFICATION S UNITS nm band < 5.3ps/nm.km nm band < 3.5ps/nm.km 1550 nm < 18ps/nm.km Slope< 0.092ps/nmsq.km Zero Dispersion wavelength nm PMD at 1310 & 1550 < 0.2ps/sqrt.km

7 DISPERSION –ITU-T G 655 PARAMETERSSPECIFICATION S UNITS 1530nm>0.1ps/nm.km 1565nm4 - 6ps/nm.km nm 4 – 11.2ps/nm.km Slope< 0.08ps/nmsq.km PMD at 1550< 0.2ps/sqrt.km

8 Geometrical Parameters –ITU-T G 652 PARAMETERSSPECIFICATION S UNITS Mode field Concentricity error < 0.8microns Mode field non circularity < 12% Clad Diameter125 ± 1microns Clad non circularity < 1 % Coat Diameter245±10microns

9 Geometrical Parameters –ITU-T G 655 PARAMETERSSPECIFICATION S UNITS Mode field Concentricity error < 0.5microns Mode field non circularity < 12% Clad Diameter125 ± 1microns Clad non circularity < 1 % Coat Diameter245±10microns

10 Mechanical Parameter –ITU-T G 652 PARAMETERSSPECIFICATION S UNITS Proof Test 1 % Fibre Curl 4 M Dynamic Fatigue 20 Static Fatigue 20 Stripping Force1.3 – 9.8N

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

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

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

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

21 No. of Loose Tubes6 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 Cable12.6 ± 0.5mm Weight of Cable130 kg / km Packing Length2 k.m ± 10 % 48F METAL FREE OPTICAL FIBRE CABLE * : Typical values which may vary as per Customer Spec

22 12 Fibre Ribbon Thixotropic Jelly Loose Tube FRP Rod Flooding Jelly 48 FIBRE DUCT OFC ( RIBBON TYPE ) Polyester Tape Rip Cord HDPE Sheath PA-12 Jacket


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