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

5. 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

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

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

8. 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

9. 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

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

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 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

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 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] 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

18. [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

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

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

21. 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

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