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Central Loose Tube Outdoor Optic fiber Cables

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Central Loose Tube Outdoor Optic fiber Cables

SM or MM Optical fiber cable suitable for duct,aerial, and direct buried
  • product details


The Central Loose Tube Optical Cable, either of single-mode or multimode type, are positioned in a loose tube made of high modulus plastic. The tubes are filled with a water-resistant filling compound. The tube is wrapped with a layer of PSF longitudinally. Between the PSP and the loose tube water-blocking material is applied to keep the cable compact and watertight. Two parallel steel wires are place at the two sides of the steel tape. The cable is completed with a PE sheath.


 Adopted to outdoor distribution.
Suitable for duct,aerial, and direct buried.   
Long distance and local area network communication.


Accurate fibre excess length ensures good mechanical and temperature performance.
High strength loose tube that is hydrolysis resistant and special tube filling compound ensure a critical protection of fibre. 
Specially designed compact structure is good at preventing loose tubes from shrinking.

PE sheath protects cable from ultraviolet radiation.

PSP enhances the cable crush-resistance, impact- resistance and moisture-proof

Two parallel steel wires ensure tensile strength

Small diameter, light weight and installation friendliness

Long delivery length


Fiber Allocation Scheme

Fiber number  Tube number  Fiber per tube  Fiber type
1-12 1 1-12F/Tube SM G652D 
MM 50/125 
MM 62.5/125

Cable Construction Details

         Items  Description
Number of fiber 1-12cores
Filling rope  No
Moisture Barrier Water blocking system
Central strength member No 
Inner sheath No
Loose tube material PBT
diameter Ф2.2(outer/inner)
Tube-filling material Tube filling compound
Steel wire size 0.8mm
Number 2
Outer sheath material PE
diameter 1.70±0.2mm

Cable Mechanical Characteristic

Items Cable  diameter Weight
1cores to 12cores 8.5±0.5mm 65±10kg/km
Installation Temperature range   -15--+60
Operation and transport temperature  -40-+70
Min Bending Radius(mm) Long term 10D
short term 20D
Min allowable Tensile Strength(N) Long term 500
short term 1200

Fiber Characteristic 

Fiber style Unit SM G652D MM 50/125 MM 62.5/125
condition nm 1310/1550 850/1300 850/1300
attenuation dB/km ≤0.36/0.23 ≤3.0/1.0 ≤3.0/1.0
Dispersion 1310nm Ps/(nm*km) ≥-3.4 ≤3.4 ..... .....
1550nm Ps/(nm*km) ≤18 ..... .....
  1625nm Ps/(nm*km) ≤22    
Bandwidth 850nm MHZ. KM ..... ≧400 ≧160
1300nm MHZ. KM ..... ≧800 ≧500
Zero dispersion wavelength nm ≧1302,≤1322 ..... .....
Zero dispersion slope Ps(nm2*km) ≤0.091 ..... .....
PMD Maximum Individual Fiber Ps√km ≤0.2 ..... .....
PMD Design Link Value Ps√km ≤0.08 ..... .....
Fibre cutoff wavelength λc nm ≧1180,≤1330 ..... .....
Cable cutoff wavelength λcc nm ≤1260 ..... .....
MFD 1310nm um 9.2±0.4 ..... .....
1550nm um 10.4±0.8 ..... .....
Numerical Aperture(NA)   ...... 0.200±0.015 0.275±0.015
Step(mean of bidirectional measurement) dB ≤0.05 ≤0.10 ≤0.10
Irregularities over fiber length and point discontinuity dB ≤0.05 ≤0.10 ≤0.10
Difference backscatter coefficient dB/km ≤0.03 ≤0.08 ≤0.10
Attenuation uniformity dB/km ≤0.01 ....... .......
Core diameter um ...... 50±1.0 62.5±2.5
Cladding diameter um 125.0±0.1 125.0±0.1 125.0±0.1
Cladding non-circularity % ≤1.0 ≤1.0 ≤1.0
Coating diameter um 242±7 242±7 242±7
Coating/chaffinch concentrically error um ≤12.0 ≤12.0 ≤12.0
Coating non circularity % ≤6.0 ≤6.0 ≤6.0
Core/cladding concentricity error um ≤0.6 ≤1.5 ≤1.5
Curl(radius) um ≤4 ..... .....

Packing Information:

Packing material: Wooden drum

Packing length: standard length of cable shall be 2000m. Other cable length is also available if required by customer

Drum size: 90*90*55 cm

Packing weight:  150kg/drum

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