Central tube Steel polyethylene laminate armored Cable
Structural features：Central tube cable(also called loose tube cables)
Application place: Installed in ducts, underground conduits, aerial
Fiber Numbers:1-12 fibers
Recommended index: 5 stars
Laying fiber optic cable has been giving priority to developing countries in the world as a strategic project.
When you're laying pipes and overhead cables,and fibers number 2-12 fibers,
Recommended by the general manager of foreign trade james xu from zion communications,
You can select the GYFXT style（Central tube） to suit the applications.This is the most popular and the first choose for the ducts/aerial.
The fibres are positioned in a loose tube made of PBT. The tube is filled with a water-resistant filling compound. Two FRP wires locates beside the center of core as a non-metallic strength member.The cable is completed with a PE(LSZH) sheath.
Steel-polyethylene bonded sheathed cable for outdoor communication, metal reinforcing members, center tube, fully filled, parallel steel wire
Good mechanical and temperature performance.
High strength loose tube that is hydrolysis resistant.
Special tube ﬁlling compound ensure a critical protection of ﬁber.
Crush resistance and ﬂexibility.
PSP enhancing moisture-proof.
Two parallel steel wires ensure tensile strength
Small diameter, light weight and friendly installation
Long delivery length
Loose Tube Colours
The properties of single mode optical fiber (ITU-T Rec. G.652.D)
@ 1310 nm
@ 1383 nm
@ 1550 nm
@ 1625 nm
£ 0.35 dB/km
£ 0.32 dB/km
£ 0.21 dB/km
£ 0.24 dB/km
£ 0.05 dB
Cable cut-off wavelength
£ 1260 nm
1300 ~ 1324 nm
£ 0.092 ps/(nm2.km)
@ 1288 ~ 1339 nm
@ 1271 ~ 1360 nm
@ 1550 nm
@ 1625 nm
£3.5 ps/(nm. km)
£5.3 ps/(nm. km)
£18 ps/(nm. km)
£22 ps/(nm. km)
PMDQ (Quadrature average*)
Mode field diameter @ 1310 nm
Core / Clad concentricity error
£ 0.5 um
125.0 ± 0.7 um
Primary coating diameter
245 ± 10 um
Proof test level
100 kpsi (=0.69 Gpa), 1%
0oC~ +70oC @ 1310 & 1550nm
£ 0.1 dB/km
This kind of cable is generally recommended
G.652D (B1.3): Supports 10Gbit/s system transmission distance up to 3000km, 40Gbit/s system transmission distance is 80km
The attenuation coefficient is the same as that of G.652C, that is, the system can work in the 1360~1530nm band.
The zero-dispersion wavelength is at 1310 nm, and the attenuation is minimal at a wavelength of 1550 nm, but has a large positive dispersion of about 18 ps (nm/km).
G.652.D is the most rigorous and fully backward compatible of all G.652 levels, and is structurally indistinguishable from ordinary G.652 fiber.
The reason for this difference is in manufacturing technology.