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The structure of GYTC8S optical cable is that 250μm optical fiber is sheathed in a loose tube made of high modulus material, and the loose tube is filled with waterproof compound. The center of the cable core is a metal reinforced core (also non-metallic, such as FRP, etc.), and the loose tube (and filler rope) is twisted around the central reinforced core to form a compact circular cable core. A layer of plastic-coated aluminum tape (APL) is added to the sheath outside the cable core in the form of longitudinal wrapping, and finally a polyethylene sheath is squeezed together with the steel strand to make the cross section of the “8″ shape.
Cable construction
| Number of fiber | 24~144core | |||||||
| Moisture Barrier | Water blocking system | |||||||
| Central strength member | material | FRP | ||||||
| diameter | 1.4mm | |||||||
| Mental strength member | material | Steel wire | ||||||
| diameter | 1.0mm*7 | |||||||
| Gallus | material | PE | ||||||
| diameter | 2.2mm*2.8mm | |||||||
| Loose tube | material | PBT | ||||||
| diameter | Ф2.2(outer/inner) | |||||||
| Tube-filling | material | Tube filling compound | ||||||
| Outer armored | material | corrugated steel tape | ||||||
| Outer sheath | material | PE | ||||||
| diameter | 1.70±0.2mm | |||||||
Fiber Color
| No. | 1 | 2 | 3 | 4 | 5 | 6 |
| Color |  |
 |
 |
 |
 |
 |
| No. | 7 | 8 | 9 | 10 | 11 | 12 |
| Color |  |
 |
 |
 |
 |
 |
Cable Mechanical characteristic
| Core | Cable diameter | Weight | |||||
| 24 cores to60 cores | 5.5*10.0±0.5mm | 145 ±5 kg/km | |||||
| 72cores | 13.1±0.5mm | 290±10kg/km | |||||
| 96cores | 14.7±0.5mm | 330±10kg/km | |||||
| 144cores | 17.9±0.5mm | 420±10kg/km | |||||
| Min Bending Radius(mm) | Long term | 10D | |||||
| Min Bending Radius(mm) | Short term | 20D | |||||
| Min allowable Tensile Strength(N) | Long term | 3000 | |||||
| Min allowable Tensile Strength(N) | Short term | 7000 | |||||
| Crush Load (N/100mm) | Long term | 1000 | |||||
| Crush Load (N/100mm) | Short term | 3000 | |||||
| Operation temperature （℃） | -40+70 | ||||||
| Installation temperature（℃） | -15+60 | ||||||
Fiber characteristic
| Fiber style | Unit | SM G652 |
SM G652D |
MM 50/125 |
MM 62.5/125 |
MM OM3-300 |
|
| condition | nm | 1310/1550 | 1310/1550 | 850/1300 | 850/1300 | 850/1300 | |
| attenuation | dB/km | ≤ | ≤ | ≤ | ≤3.0/1.0 | ≤3.0/1.0 | |
| 0.36/0.23 | 0.34/0.22 | 3.0/1.0 | —- | —- | |||
| Dispresion | 1550nm | Ps/(nm*km) | —- | ≤18 | —- | —- | Dispresion |
| 1625nm | Ps/(nm*km) | —- | ≤22 | —- | —- | ||
| Bandwith | 850nm | MHZ.KM | —- | —- | ≧400 | ≧160 | Bandwith |
| 1300nm | MHZ.KM | —- | —- | ≧800 | ≧500 | ||
| Zero dispersion wavelength | nm | 1300-1324 | ≧1302, ≤1322 |
—- | —- | ≧ 1295, ≤1320 |
|
| Zero dispresion slope | nm | ≤0.092 | ≤0.091 | —- | —- | —- | |
| PMD Maximum Individual Fibr | ≤0.2 | ≤0.2 | —- | —- | ≤0.11 | ||
| PMD Design Link Value | Ps(nm2*k m) |
≤0.12 | ≤0.08 | —- | —- | —- | |
| Fibre cutoff wavelength λc | nm | ≧ 1180, ≤1330 |
≧1180, ≤1330 |
—- | —- | —- | |
| Cable sutoff wavelength λcc | nm | ≤1260 | ≤1260 | —- | —- | —- | |
| MFD | 1310nm | um | 9.2+/-0.4 | 9.2+/-0.4 | —- | —- | —- |
| 1550nm | um | 10.4+/-0.8 | 10.4+/-0.8 | —- | —- | —- | |
| Numerical Aperture(NA) | —- | —- | 0.200+/ -0.015 |
0.275+/-0. 015 |
0.200+/-0 .015 |
||
| Step(mean of bidirectional measurement) | dB | ≤0.05 | ≤0.05 | ≤0.10 | ≤0.10 | ≤0.10 | |
| Irregularities over fiber length and point | dB | ≤0.05 | ≤0.05 | ≤0.10 | ≤0.10 | ≤0.10 | |
| Discontinuity | |||||||
| Difference backscatter coefficient |
dB/km | ≤0.05 | ≤0.03 | ≤0.08 | ≤0.10 | ≤0.08 | |
| Attenuation uniformity | dB/km | ≤0.01 | ≤0.01 | ||||
| Core diameter | um | 50+/-1.0 | 62.5+/-2.5 | 50+/-1.0 | |||
| Cladding diameter | um | 125.0+/-0.1 | 125.0+/-0.1 | 125.0+/-0.1 | 125.0+/-0.1 | 125.0+/-0.1 | |
| Cladding non-circularity | % | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | |
| Coating diameter | um | 242+/-7 | 242+/-7 | 242+/-7 | 242+/-7 | 242+/-7 | |
| Coating/chaffinch concentrically error |
um | ≤12.0 | ≤12.0 | ≤12.0 | ≤12.0 | ≤12.0 | |
| Coating non-circularity | % | ≤6.0 | ≤6.0 | ≤6.0 | ≤6.0 | ≤6.0 | |
| Core/cladding concentricity error | um | ≤0.6 | ≤0.6 | ≤1.5 | ≤1.5 | ≤1.5 | |
| Curl(radius) | um | ≤4 | ≤4 | —- | —- | —- | |
Package
| 1.Packing material: Wooden drum | |||||||
| 2.Packing length: standard length of cable shall be 2 km. Other cable length is also available | |||||||
| if required by customer |
Cable marking and cable reel marking
The cable sheath shall be marked with white characters according to customer’s requirement.
