1.1  Cable Description

12/24/36/48//72/96/144 G.657A2SM-fibers.

 Loose tubes SZ-stranded.

 Suitable for air blown cable in micro-ductinstallation. 

1.2  Reference 

ITU-T G.657A2	Characteristics of a single-mode optical fiber
IEC 60794-1-1	Optical fiber cables- part1-1-Generic specification-General
IEC 60794-1-2	Optical fiber cables- part1-2-Generic specification-Basic optical cable test procedure
IEC 60794-3	Optical fiber cables- part3-Sectional specification- Outdoor cables
IEC 60794-5	Optical fiber cables- part5-Sectional specification- Microduct cabling for installation by blowing

1.3  Working Condition

                  Transportation and storage temperature:-40℃～+70℃

                    Installation temperature: -15℃～+60℃

                    Operation temperature: -20℃～+70℃

1.4  Minimum Allowable Bending Radius

                   Static: 10D

                     Dynamic: 20D

                     D is the out diameter of the cable

2. Optical Fiber In Cable(ITU-G657A2)

Optical properties of the SM fiber areachieved through a germanium doped silica based core with a pure silicacladding which meets ITU-T G657A2, UV curable acrylate protective coating isapplied over the glass cladding to provide the necessary maximum fiberlifetime.

Geometrical, optical, and mechanicalcharacteristics of fiber in cable as the following table:

 

Category	Description	Specification
		Before cable	After cable
Geometrical Characteristics	Cladding diameter	125.0 ± 1 mm
	Cladding non-circularity	£ 1.0 %
	Core concentricity error	£ 0.6mm
	Coating diameter	245± 10 mm(Before Colored) 250 ± 15 mm (Colored)
	Coating/cladding concentricity error	£ 12mm
Optical Characteristics	Mode field diameter at 1310 nm	9.2 ± 0.4 mm
	Point discontinuity	£ 0.05dB
	Attenuation at 1310 nm	£ 0.34 dB/km	£ 0.35 dB/km
	Attenuation at 1383 nm	£ 0.34 dB/km	£ 0.35 dB/km
	Attenuation at 1550 nm	£ 0.21 dB/km	£ 0.22dB/km
	Attenuation at 1625 nm	£ 0.23 dB/km	£ 0.24dB/km
	Dispersion in 1288 – 1339 nm	£ 3.5 ps/(nm·km)
	Dispersion in 1271 – 1360 nm	£ 5.3 ps/(nm·km)
	Dispersion at 1550 nm	£ 18 ps/(nm·km)
	Zero dispersion wavelength	1300 – 1324 nm
	Zero dispersion slope	£ 0.092 ps/(nm2·km)
	Cable cut-off wavelength	£ 1260 nm
	Polarization mode dispersion individual fiber	£ 0.2 ps/Ökm
	Polarization mode dispersion design link value (M=20, Q=0.01%)	£ 0.1 ps/Ökm
	Macro-bend loss (100 turns, 30mm radius, 1550/1625nm)	£ 0.1 dB
Mechanical Specification	Proof stress level	³100kpsi (0.69 GPa)
	Coating strip force(peak value)	1.3~8.9N
	Fiber curl (Radius)	³ 4 m

 

3. OpticCable

3.1 General Design

Optical fibers are housed in loose tubes that are made ofhigh-modulus plastic and filled with waterproof compounds.

FRP is applied as central strength member.

Loose tubes are SZ-stranded around the strength member.

Water blocking yarns are used in and over the cable core toprevent it from water ingress. Polyethylene sheath is applied over the cablecore as the outer sheath.

3.2   Construction

3.2.2 Dimensions and Descriptions of Cable Constructions

 

Item	contents	Value
		12	24	36	48	72	96	144
Loose tube	Number	1	2	3	4	6	8	12
	Outer diameter (mm)	1.5
Filler	Number	5	4	3	2	0	0	0

Max. fiber Counts per tube	G.652D	12
Central strength member	Material	FRP
	Diameter (mm)	1.6±0.2mm
	Diameter ofPE layer（mm）							2.6		4.3
Outer sheath	Material	HDPE
	Color	Black
	Thickness (mm)	Approx.0.5
Cable diameter(mm)		5.4±0.2	5.4±0.2	5.4±0.2	5.4±0.2	5.6±0.2	6.6±0.2		8.2±0.2
Cable weight(kg/km) Approx.		20	20	20	20	26	39		65

3.2.3 Mechanical Performance of Cable 

Tensile performance(N)		Crush(N/100mm)
Short term	Long term	Short term	Long term
0.5*G	0.15*G	450	150

G is the weight of cable per kilometer; theunit is Newton (N).

3.2.4 Color Code of the Fiber

Each fiber can be identifiable throughout the length of the cablein accordance with the following color sequence.  Fiber color in each tube starts from No. 1Blue. 

12 fibers per tube	1	2	3	4	5	6
	Blue	Orange	Green	Brown	Slate	White
	7	8	9	10	11	12
	Red	Black	Yellow	Purple	Pink	Aqua

3.2.5Color Code of the Loose Tube and Filler 

The loose tubes will be identifiable in accordance with thefollowing color sequence. 

Loose tube color code	1	2	3	4	5	6
	Blue	Orange	Green	Brown	Slate	White
	7	8	9	10	11	12
	Red	Black	Yellow	Purple	Pink	Aqua

The color of the fillers will be natural.

3.3  Mechanical, Electrical andEnvironmental Test Characteristics

The finished cables can be subjectedto the following mechanical, electrical and environmental conditions.

Item	Test Method	Requirements
Tensile	IEC 60794-1-2-E1	The  maximum  increase  in  attenuation   less

performance	Load: according to short term tensile described in 3.2.3 Cable length under tension: Not less than 50m. Duration of load sustain: 1min. Velocity oftransfer device: 10mm/min	than 0.1dB. The maximum fiber strain less than 0.3% under maximum tensile short term load. No change in attenuation after test at 1550nm. Under visual examination without magnification, no damage to the sheath or to the cable elements after test.
Crush	IEC 60794-1-2-E3 Load: 450N Duration of load: 1min	No change in attenuation after test at 1550nm. Under visual examination without magnification, no damage to the sheath or to the cable elements. The imprint of the striking surface on the sheath is not considered mechanical damage.
Bend	IEC 60794-1-2-E11A Mandrel radius: 10 times cable diameter Turns:10 Cycles:5	No change in attenuation at 1550nm after test. Under visual examination without magnification, no damage to the sheath or to the cable elements.
Repeated bending	IEC 60794-1-2-E6 Bending radius: 20 times cable diameter Cycles: 25 Load: 25N Duration of cycle: Approximately 2s.	No change in attenuation at 1550nm after test. Under visual examination without magnification, no damage to the sheath or to the cable elements.
Torsion	IEC 60794-1-2-E7 Cycles:5 Length under test: 1m Turns: 180° Load: 40N	The variation on attenuation for each fiber less than 0.05dB at 1550nm Under visual examination without magnification, no damage to the sheath or to the   cable elements. No permanent change in attenuation after  test.
Temperature cycling	IEC 60794-1-2-F1 Sample length: at least 1000m Temperature range: -20℃～+70℃Cycles: 2 Temperature cycling test dwell  time: 12  hours	There is no change in attenuation coefficient at 1550nm after the test.
Water Penetration	IEC 60794-1-2-F5B Time : 24 hours Sample length : 3m Water height : 1m	No water leakage.
Compound flow	IEC 60794-1-2-E14 Sample count:5 Sample length:300 5 mm, Remove length: 130 2,5 mm, Time:24h	No filling compound dripped.
Other parameters	According to IEC 60794 ,YD/T 1460.4-2006

Remark: “No attenuation changes” is considered as the attenuationchanges ≤ 0.05 dB.

 

4. Cable SheathMarking

Unless otherwise specified, the cable sheath marking shall be asfollows:

Ø  Color: white

Ø  Contents:  the year of manufacture,the type of cable, length marking

Ø  Interval: 1m