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Double Jacket Underwater Optical Cable GYTA33 12-288core

GYTA33 Optical Fiber Cable
Gel-filled, Double jacket,
Steel wire armored


      1.1  This specification covers the requirements for the supply of single-mode optical fiber cables.
 
      1.2  The single mode optical fiber cable comply with the requirements of this specification and generally meet any latest relevant ITU-T Recommendation G.652. 

2. Fiber characteristics
2.1 G.652
2.1.1 Geometric characteristics

Item Construction
Mode field diameter At 1310nm 9.2±0.4μm
Cladding diameter 125±1μm
Core concentricity error ≤0.6μm
Cladding non-circularity ≤1.0%
Cut-off wavelength (λcc) (for cable) ≤1260nm
Cut-off wavelength (λc) (for fiber) 1180nm~1330nm
Primary coating diameter (Not included color layer) 245±10μm
(Included color layer) 250±15μm
Coating-cladding concentricity error ≤12.5μm
Fiber curl radius ≥4m
 
2.1.2 Transmission characteristics

Item Performance
Attenuation At 1310nm ≤0.36dB/km
At 1550nm ≤0.22dB/km
Macro bending loss Φ=60mm, 100turns at 1550nm ≤0.1dB
Chromatic dispersion Within 1288~1339nm ≤3.5ps/nm·km
At 1550nm ≤18ps/nm·km
Zero dispersion wavelength 1300~1324nm
Zero dispersion slope ≤0.092ps/nm2·km
 
3 Optical Fiber Cable
3.1 Cross section

3.2 Dimension of the cable

Amount. of fiber Max. numb. of the fiber per tube Number of
Tube
Positions
Number
of Active
Tubes
Overall diameter
(Approx.)
Weight
(Approx.)
mm kg/km
12 6 5 2 16.3 521
24 6 5 4 16.3 521
36 6 6 6 16.9 543
48 12 5 4 18.2 613
72 12 6 6 18.5 679
96 12 8 8 20.3 767
144 12 12 12 23.5 957
192 12 16 16 24.5 1078
288 12 24 24 27.1 1196
 
3.3 Performance

NO ITEM TEST METHOD SPECIFICATION
1 Tensile performance
IEC60794-1-21-E1
- Short-term load: 10000N
- Time: 5 minute
Loss change £ 0.10 [email protected] nm
 (after test)
- Fiber strain £ 0.60 %
- No sheath damage
-Long-term load: 4000N
- Time: 5 minute
- Loss change £ 0.10 [email protected] nm
(during test)
- Fiber strain £ 0.20 %
- No sheath damage
2 Crush test
IEC60794-1-21-E3
- Load: 5000 N /100mm
- Time: 5 minute
- Length: 100 mm
Loss change £ 0.10 [email protected] nm
(after test)
- No sheath damage
3 Impact test
IEC60794-1-21-E4
- Impact hight:1m
- Impact weight:1kg
- Points of impact: 5
- Times of per point: 1
Loss change £ 0.10 [email protected] nm
(during test)
- No sheath damage
4 Temperature
Cycling
IEC60794-1-22-F1
- Temperature step:
+20oC→-40oC→+70oC→+20oC
- Number of cycle: 2 turns
- Time per each step: 12 hrs
- Loss change £ 0.15dB/[email protected] nm
 (during test)
- Loss change £ 0.05dB/[email protected] nm
 (after test)
- No sheath damage
D*: Cable diameter

3.4 Color Coding of Loose Tubes and Fibers
Fiber color code

Loose tube color code

12-144core 1 2 3 4 5 6 7 8 9 10 11 12
Layer 1 Blue Orange Green Brown Gray White Red Black Yellow Violet Pink Aqua

288core 1 2 3 4 5 6 7 8 9
Layer 1 Blue Orange Green Brown Gray White Red Black Yellow
Layer 2 10 11 12 13 14 15 16 17 18
Blue Orange Green Brown Gray White Red Black Yellow
19 20 21 22   23 24      
Violet Pink Aqua Blue Orange Green      

4. Sheath marking


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