Fiber Specifications
Parameter
Requirement
Standard (if applicable)
Core non-circularity
≤ 6%
ITU-T G.652
Cladding diameter
125.0 ± 0.7 μm
-
Core/Cladding concentricity
≤ 0.6 μm
Cladding non-circularity
≤ 1.0%
Coating diameter
245 ± 10 μm
Cladding/Coating concentricity
≤ 12 μm
Attenuation coefficient
1310 nm: ≤ 0.35 dB/km
1550 nm: ≤ 0.21 dB/km
Zero dispersion slope
≤ 0.092 ps/(nm²·km)
Zero dispersion wavelength
1300–1324 nm
Polarization dispersion
≤ 0.20 ps/√km
Mode field diameter (1310 nm)
9.0 ± 0.4 μm
Cut-off wavelength
1170–1330 nm
Chromatic dispersion
1288–1339 nm: ≤ 3.4 ps/(nm·km)
1550 nm: ≤ 18 ps/(nm·km)
1625 nm: ≤ 22 ps/(nm·km)
Cable Parameters
Value
Fibers per loose tube
6
Number of tubes
2 (total 12 fibers)
Inner sheath thickness
1.0 mm
Outer sheath thickness
1.7 mm
Aramid area
2.8 mm²
Cable diameter
11.6 mm (±5%)
Cable cross-section
106 mm²
Cable weight
105 kg/km (±10%)
4. Mechanical & Environmental Performance
5. Test Requirements
Test Type
Standard
Key Criteria
Tensile Test
IEC 60794-1-21-E1
- RTS: No break at 100% RTS.
- UOS (60% RTS): Fiber strain < 0.35%, no added attenuation.
- MAT (40% RTS): Strain < 0.05%.
Crush Test
IEC 60794-1-21-E3
≤ 0.1 dB attenuation @1550 nm under 2200 N; no residual attenuation.
Impact Test
IEC 60794-1-21-E4
450g weight, 1m height, 5 impacts. No sheath cracks or residual attenuation.
Repeated Bending
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