Optical Fiber Cables - CLT TYPE

PTCL Cables offer CLT (Central Loose Tube) Optical Fiber Cables. CLT Optical Fiber Cables are solution for High Performance Aerial Environments including Power Transmission and Distribution Networks.


  • Aerial Installation
  • Junction Communication
    System, Subscriber Network System


  • Loose Tube Filled With Gel
  • Dry Core
  • Corrugated Steel Tape
  • Two Steel Strength Members
  • Polyethylene Outer Jacket

Fiber Type

Single Mode ITU-T G.652D

Fiber Count

02 Fibers

Loose Tube Material

PBT (Polybutylene Terephthalate)

Loose Tube Filling Material

Thixotropic Jelly Filling Compound

Strength Member

Phosphorus Coated Steel Wire (Placed longitudinally opposite to

each other alongside loose tube)

Armouring Corrugated

Steel Tape

Outer Sheath Material

High Density Polyethylene (HDPE/MDPE)

Printing on Outer Sheath

Engraved Hot Foil Ink or Inkjet Printing

Drum Length

1000 & 2000 Meters ± 5%

Single Mode Fiber


Fiber Colour Coding

As per TIA/EIA-598A&C

Mode Field Diameter, μm

8.6 to 9.5 ± 0.7

Cladding Diameter, μm

125 ± 1

Core Clad Concentricity error, μm

<_ 0.8 μm

Cladding Non-Circularity, %

<_ 2 %

Cable Cut-off Wavelength, nm

<_1260 nm

Chromatic Dispersion (ps/nm.km)

<_ 3.5 @ 1310nm

<_18 @ 1550nm

Cabled Attenuation @ 1310 nm (dB/km)

Cabled Attenuation @ 1550 nm (dB/km)

<_ 0.35 (average)

<_ 0.22 (average)

Polarized Mode Dispersion (PMD) ps/_km

<_ 0.2

Tensile Strength (N) (Max)

-10 °C to +70 °C

Tensile Strength (N) (Max)


Crush Strength (N) (max)


Minimum Bending Radius

10 x outer without load

Diameter of cable (mm)

20 x outer with load


  • Fibers in the loose tube good fexibility and bending endurance
  • Cable is with excellent mechanical and environmental properties
  • Small Diameter, Light Weight & Flexible
  • Provides good crush resistance