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Based on the optimum RIP design, TFO LightBend? fibre is a full spectrum fibre with zero water peak, low
attenuation and excellent uniformity, low chromatic dispersion and PMD, excellent macrobending loss at
minimum radius 10mm, superior and stable geometrical size control level, this full spectrum fibre is
applicable to transmission system operating over the entire wavelength from 1260nm to 1625nm.
TFO LightBend? fibre meets or exceeds the ITU-T Recommendation G.657.A1 and IEC 60793-2-50 type 6.a1
Optical Fiber Specification. With the same mode field diameter as standard single mode fibre, this makes
TFO LightBend? fibre fully compatible with traditional ITU-T G.652.D and IEC 60793-2-50 type B1.3 fibre
and widely used in all types of optical cables.
|
TFO LightBend? (G.657.A1) |
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|
Characteristics |
Conditions |
Parameters |
Unit |
|
Optical properties |
|||
|
Attenuation Coefficient |
1310 nm |
≤ 0.34 |
dB/km |
|
1285-1330 nm |
≤ 0.37 |
dB/km |
|
|
1383 nm（after hydrogen aging） |
≤ 0.31 |
dB/km |
|
|
1490 nm |
≤ 0.23 |
dB/km |
|
|
1550 nm |
≤ 0.20 |
dB/km |
|
|
1525 - 1575 nm |
≤ 0.21 |
dB/km |
|
|
1625 nm |
≤ 0.22 |
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| |
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 |
≤ 0.06 |
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 |
|||
|
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 |
10 turns of 15 mm radius, 1550nm |
≤ 0.25 |
dB |
|
10 turns of 15 mm radius, 1625 nm |
≤ 1.0 |
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 |
|||
|
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 |
