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.