Optical Fiber Submarine Cable

 

1. Structure

 

2. Design

Item Physical Characteristics Unit Nominal Value
Structure & Parameter Fiber No. 48
FIMT O.D. mm Φ3.8
HDPE Sheath Thickness (Black) mm 4.5
Cable core O.D. mm 12.8
Galvanized steel wires mm Φ3.5×14
Thickness of 2 layers PP-yarn after wrapping mm 3.6
Cable O.D. mm 27.0
Weight in air, approximately. kg/m 1.4
Weight in seawater, approximately. kg/m 0.9
Nominal Specification Minimum Breaking Load,(UTS) kN 160
Nominal Transient Tensile Load,(NTTS) kN 125
Nominal Operating Tensile Load,(NOTS) kN 62
Nominal Permanent Tensile Load, NPTS kN 41
Minimum Bending Radius.( m 1.0
Minimum Bending Radius.(>NPTS) m 1.5
Operating Temperature Range -30~+50
Storage Temperature Range -40~+60
Crush(IEC-794-1-E3) kN 30
Impact(IEC-794-1-E4) J 200

 

3. FIBER CHARACTERISTIC

ITU-T G.652D Unit Nominal value ±
Cladding Diameter μm 125 0.7
Cladding-Core Concentricity Error μm ≤ 0.5  
Cladding Non-circularity % ≤ 1  
Coating Diameter (uncolored) μm 245 5
Coating-Cladding Concentricity Error μm ≤ 12  
Mode Field Diameter, MFD @ 1310 nm μm 9.2 0.4
Attenuation @ 1310 nm dB/km ≤ 0.360  
Attenuation @ 1550 nm dB/km ≤ 0.220  
Zero Dispersion Wavelength nm 1300~1322  
Zero Dispersion Slope ps/nm2·km ≤ 0.092  
Chromatic Dispersion @ 1310 nm ps/nm·km ≤ 3.5  
Chromatic Dispersion @ 1550 nm ps/nm·km ≤ 18  
Polarization Mode Dispersion, PMD ps/√km ≤ 0.15 -
Cable Cut-off Wavelength nm ≤ 1260  
Proof Test Level kpsi 200  

4. Features

  • The Fiber In Metal Tube (FIMT) provides effective protection against water ingress, mechanical & external forces and prevents hydrogen induced loss.
  • The LW cable core can be armoured with single or double layers of GSW to give the cable increased tensile strength, excellent abrasion protection and enhanced crush and impact resistance.
  • Asphalt is added onto the armor, rope and sheath.