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TFO WideBand LDTM fibre is an ITU-T G.652.D compliant SSMF, but with lower attenuation, chromatic
dispersion and PMD. This can provide longer transmission distance between regenerators, meanwhile
its improved bend performance exceeds the requirements of the ITU-T G.657.A1 standard.
The fibre has a 9.0μm MFD which is compatible to the majority of SSMF on the market today. The
improved bend performance of TFO WideBand LDTM fibre provides greater margins in the field during
installation and maintenance, and allows for the design and deployment of smaller and lighter cables
which can improve duct utilization. The improved properties consolidate the foundation of new network
and upgrades of existing networks.
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TFO WideBand LDTM (G.652.D LD) |
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Characteristics |
Conditions |
Parameters |
Unit |
|
Optical properties |
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|
Attenuation coefficient |
1310 nm |
≤ 0.32 |
dB/km |
|
1285-1330 nm |
≤ 0.35 |
dB/km |
|
|
1383 nm（after hydrogen aging） |
≤ 0.29 |
dB/km |
|
|
1490 nm |
≤ 0.22 |
dB/km |
|
|
1550 nm |
≤ 0.18 |
dB/km |
|
|
1525 - 1575 nm |
≤ 0.19 |
dB/km |
|
|
1625 nm |
≤ 0.20 |
dB/km |
|
|
Mode Field Diameter(MFD) |
1310 nm |
9.0 ± 0.3 |
μm |
|
1550 nm |
10.2 ± 0.4 |
μm |
|
|
Cut-Off Wavelength |
|
|
|
|
Cable Cut-Off |
|
≤ 1260 |
nm |
|
Chromatic Dispersion |
|
|
|
|
Zero Dispersion Wavelength |
|
1300 - 1324 |
nm |
|
Zero Dispersion Slope |
|
≤ 0.090 |
ps/nm2/km |
|
Dispersion Coefficient |
1285 - 1339 nm |
≤ |3.2| |
ps/nm/km |
|
1550 nm |
≤ 17 |
ps/nm/km |
|
|
1625 nm |
≤ 21 |
ps/nm/km |
|
|
Polarisation Mode Dispersion |
|
|
|
|
PMD Coefficient |
Uncabled fibre |
≤ 0.10 |
ps/√km |
|
PMD link design value |
≤ 0.04 |
ps/√km |
|
|
Point Discontinuity |
1310 nm |
≤ 0.05 |
dB |
|
1550 nm |
≤ 0.05 |
dB |
|
|
Effective Group Refractive Index |
1310 nm |
1.4671 |
|
|
1550 nm |
1.4675 |
|
|
|
1625 nm |
1.4680 |
|
|
|
Geometrical Properties |
|||
|
Core Non-circularity |
|
≤ 6 |
% |
|
Cladding Diameter |
|
125.0 ± 0.5 |
μm |
|
Core/Cladding Concentricity Error |
|
≤ 0.4 |
μm |
|
Cladding Non-Circularity |
|
≤ 0.6 |
% |
|
Coating Diameter |
|
242 ± 5 |
μm |
|
Coating/Cladding Concentricity Error |
|
≤ 8 |
μm |
|
Mechanical properties |
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|
Proof Test |
Fibre strain |
≥ 1 |
% |
|
Fibre load |
≥ 9 |
N |
|
|
Stress |
≥ 100 |
kpsi |
|
|
Dynamic Stress Corrosion Susceptibility Factor nd |
Unaged |
≥ 20 |
|
|
Aged（30 days @ 85℃, 85% R.H.） |
≥ 20 |
|
|
|
Macro Bending Sensitivity |
100 turns of 30 mm radius, 1625 nm |
≤ 0.05 |
dB |
|
10 turns of 15 mm radius, 1550nm |
≤ 0.1 |
dB |
|
|
10 turns of 15 mm radius, 1625 nm |
≤ 0.3 |
dB |
|
|
1 turns of 10 mm radius, 1550 nm |
≤ 0.75 |
dB |
|
|
1 turns of 10 mm radius, 1625 nm |
≤ 1.5 |
dB |
|
|
Coating Strip Force |
Peak value |
1.3 - 8.9 |
N |
|
Fibre Curl |
|
≥ 4 |
m |
|
Environmental Properties |
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|
Accelerated Ageing（30days @ 85℃ 85% R.H.） |
Induced attenuation（1310 and 1550 nm） |
≤ 0.05 |
dB/km |
|
Dry heat aging（30days @ 85℃） |
Induced attenuation（1310 and 1550 nm） |
≤ 0.05 |
dB/km |
|
Temperature Cycling （-60℃- +85℃） |
Induced attenuation（1310 and 1550 nm） |
≤ 0.05 |
dB/km |
|
Water Soak（30 days @ 23℃） |
Induced attenuation（1310 and 1550 nm） |
≤ 0.05 |
dB/km |
