Single Mode Fiber G.657.A2
Fiber type G.657.A2
OPK code A2
Rev. 014-21/41
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Fiber type |
G.657.A2 |
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OPK code |
A2 |
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Core |
Germanium doped silica |
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Cladding |
Silica, step index and matched clad type |
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Coating |
Dual layers of UV-cured acrylate |
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Optical Characteristics |
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Attenuation coefficient Loose tube Cables (typical / max.) |
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at 1310 nm |
0.32 / 0.36 dB/km |
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at 1550 nm |
0.19 / 0.24 dB/km |
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at 1625 nm |
0.22 / 0.26 dB/km |
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Attenuation coefficient Tight Buffered Cables (typical / max.) |
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at 1310 nm |
0.35 / 0.40 dB/km |
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at 1550 nm |
0.25 / 0.40 dB/km |
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Point of discontinuity at 1310 nm and 1550 nm |
≤ 0.1 dB |
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Cable cut-off wavelength (λcc) |
≤ 1260 nm |
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Zero dispersion wavelength |
1300 – 1324 nm |
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Zero dispersion slope |
≤ 0.092 (ps/(nm2/km ) |
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Maximum individual fiber PMD |
≤ 0.10 ps/Ökm |
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Fiber PMD link value |
≤ 0.06 ps/Ökm |
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Effective group index of refraction at 1310 nm |
1.467 |
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Effective group index of refraction at 1550 nm |
1.468 |
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Backscatter coefficient at 1310 nm |
-79.2 dB |
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Backscatter coefficient at 1550 nm |
-81.7 dB |
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Geometrical Characteristics |
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Mode field diameter at 1310 nm |
8.6 ± 0.4 µm |
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Core/Cladding concentricity error |
≤ 0.5 µm |
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Cladding diameter |
125.0 ± 0.7 µm |
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Cladding non-circularity |
≤ 0.7% |
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Primary coating diameter (uncoloured fibre) |
242 ±5 µm |
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Primary coating diameter (coloured fibre) |
250 ±10 µm |
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Fibre curl radius |
≥ 4.0 m |
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Coating-Cladding concentricity |
≤ 12 µm |
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Macrobending loss |
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10 turns, mandrel diameter 30 mm at 1550 nm |
≤ 0.03 dB |
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10 turns, mandrel diameter 30 mm at 1625 nm |
≤ 0.1 dB |
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1 turn, mandrel diameter 20 mm at 1550 nm |
≤ 0.1 dB |
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1 turn, mandrel diameter 20 mm at 1625 nm |
≤ 0.2 dB |
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1 turn, mandrel diameter 15 mm at 1550 nm |
≤ 0.5 dB |
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1 turn, mandrel diameter 15 mm at 1625 nm |
≤ 1.0 dB |
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Mechanical Characteristics |
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Proof test level |
≥ 100 kpsi (1.0% strain) |
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Coating strip force |
1.3 ~ 8.9 N |
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Dynamic fatigue resistance parameter |
≥ 20 |
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Typical attenuation is the value measured for at least 90% of the fibers in the cable. OTDR measurement values can only be guaranteed for cable lengths of 1000 m and more. Cable on the reel may show an discontinuity of the OTDR curve caused by winding of the cable on the reel. |
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