Single-mode optical fibre |
standard |
ITU-T G.652 B |
Type of fibre |
single mode, matched cladding |
Type of primary coating |
dual layer UV-cured acrylate |
Core material composition |
germanium doped silica |
|
Dimensions |
|
|
cladding diameter |
125 ± 1 µm |
|
mode field/cladding concentricity error |
≤ 0.8 µm |
|
mode field non-circularity |
≤ 6 % |
|
cladding non-circularity |
≤ 2 % |
|
coating diameter (uncoloured fibre) |
245 ± 10 µm |
|
coating non-circularity |
≤ 10 % |
|
coating/cladding eccentricity |
≤ 12.5 µm |
|
|
Mechanical properties |
|
|
prooftest entire length |
≥ 1 % |
|
bending sensitivity 100 turns Ø mandrel 60 mm |
≤ 0.2 db |
|
strippability ; stripping force |
≤ 3 N/5cm |
|
|
Centre Support Member |
straight rod |
|
Material |
Fibre Reinforced Plastic |
Ø 2.3 mm |
Oversheath |
none |
|
|
Centre waterblock |
filling compound |
|
Material |
petroleum jelly |
|
|
Secondary coating |
loose tube principle |
|
Material |
PBT |
Ø 2.15 ± 0.05 mm |
Filling of the tube |
thixotropic gel |
|
Fibre count |
4 |
|
|
Interstitial waterblock |
filling compound |
|
Material |
petroleum jelly |
|
cover layer |
swelling tape |
|
|
Inner sheath |
polymer |
|
Material |
HDPE |
Ø 9.2 mm |
Thickness |
nominal |
1 mm |
|
Reinforcement |
helical aramide yarns |
|
Material |
Aramide |
Ø 9.4 mm |
Young’s modulus (yarn) |
≥ 100 Gpa |
|
yarns |
21 |
|
swelling yarns |
5 |
|
|
Outer sheath |
extruded polymer |
|
Material |
HDPE |
Ø 12.8 |
Minimum thickness |
≥ 1.40 mm |
|
Nominal thickness |
1.65 mm |
|