1. Optical fibers are positioned in a loose tube made of PBT.
2.The tubes are filled with a water resistant filling compound.
3.The tube is covered with FRP and aramid fiber as strength member.
4.PE outer sheath.

Fiber & tube colo
Fiber
| NO | 1 | 2 | 3 | 4 | 5 | 6 |
| Color | Blue | Orange | / | / | / | / |
Tube
| No. | 1 |
| Color | Natural |
Structure parameter
Item | Content | Unit | Value |
Fiber count | Number | / | 1~12 |
| Fiber | model | / | G657A2 |
| Max.fibers per tube | Count | / | 12 |
| loose tube | diameter | mm | 2.0 |
| loose tube | thickness | mm | 0.32 |
| Material 1 | / | 2*1.6/1.8/2.0/2.5 FRP |
Material 2 | / | 1670*3 Aramid fiber | |
| Color | / | Black |
| Material | / | PE | |
Cable diamete | ±5% | mm | 8.5±0.1 |
Cable weight | ±10% | kg/km | 43.5 |
Mechanical & Environmental Performance
| Item | Contents | Value |
| Max. tensile load | Short term | 1300N |
| Max. crush resistance | Short term | 2200N |
Min. bending radius | Installation | 15 x cable diameter |
| Operation | 10 x cable diameter | |
Temperature range | Operation | -20℃ ~ +70℃ |
Optical fiber
Item | Unit | Specification | |
| G. 657A2 | |||
Mode field diameter | 1310n | mm | 9.2 ± 0.4 |
1550nm | mm | 10.4 ± 0.5 | |
Cladding diameter | mm | 125.0 ± 0.7 | |
Cladding non-circularity | % | £1.0 | |
Core concentricity error | mm | £0.5 | |
Coating diameter | mm | 242 ± 7 | |
Coating/cladding concentricity error | mm | £12 | |
| Cable cut-off wavelength | nm | £ 1260 | |
Attenuation Coefficient | 1310nm | dB/km | £0.35 |
| 1550nm | dB/km | £0.21 | |
Macro-bend loss (1 turn, 10mm radius) | 1550nm | dB/km | £0.75 |
| 1625nm | dB/km | £1.5 | |
Proof stress level | kpsi | ≥100 | |





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