Optical Fiber Specifications

Incab uses improved single-mode fiber – Corning® SMF-28® Ultra.

It has the following advantages compared to the standard fiber*:
  — Signal attenuation at least 10% lower than that of standard fiber*
  — 10 times more resistant to bending than standard fiber*
  — 100% compatible with other single-mode fibers

*Standard fiber Corning® SMF28e+®


By default we use Corning optical fiber in manufacturing, however, at the client’s request, we can produce cable with fiber from another supplier.

Optical Fiber Specifications:
Fiber type A U ULL N G.654.E G.657.A2 G.657.B3
Fiber brand Corning® SMF28e+® Corning® SMF28e+® LL Corning® SMF-28® Ultra Corning® SMF-28® Ultra 200 Corning® SMF-28® ULL Corning® LEAF® Corning® TXF® Corning® ClearCurve® LBL Corning® ClearCurve® ZBL
ITU-T recommendation G.652.D G.652.D G.652.D / G.657.A1 G.652.D / G.657.A1 G.652.B / G.654.C G.655.D G.654.E G.652.D / G.657.A2/B2 G.657.B3
Dimensional Specifications
Core-Clad Concentricity 0.5 0.5 0.5 0.5 0.5 0.5 0.8 0.5 0.5
Cladding Diameter 125±0.7 125±0.7 125±0.7 125±0.7 125±0.7 125±0.7 125±0.7 125±0.7 125±0.7
Cladding Non-Circularity 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7
Coating Diameter 242±5 242±5 242±5 200±5 242±5 242±5 242±5 242±5 242±5
Transmission Specifications
Wavelength, nm 1310 – 1625 1310 – 1625 1310 – 1625 1310 – 1625 1310 – 1625 1550 1550 – 1625 1310 – 1625 1310 – 1625
Maximum Attenuation (dB/km)
1310 nm wavelength 0.35 0.32 0.32 0.32 0.31 0.35 0.35
1383 nm wavelength 0.35 0.32 0.32 0.32 0.40 0.35 0.35
1490 nm wavelength 0.24 0.21 0.21 0.21 0.24 0.24
1550 nm wavelength 0.20 0.18 0.18 0.18 0.17 0.19 0.17 0.20 0.20
1625 nm wavelength 0.23 0.20 0.20 0.20 0.20 0.21 0.19 0.23 0.23
Dispersion ps/(nm*km)
1550 nm wavelength 18 18 18 18 18 4 23 18 18
1625 nm wavelength 22 22 22 22 22 10 29 23 23
Polarization Mode Dispersion (PMD), ps/√km 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.2
Zero Dispersion 0.092 0.092 0.092 0.092 0.07 0.092 0.092
Zero Dispersion Wavelength, nm 1304…1324 1304…1324 1304…1324 1304…1324 1300…1324 1304…1324 1304…1324
Cable Cutoff Wavelength, nm 1260 1260 1260 1260 1260 1360 1520 1260 1260
Mode-Field Diameter, (μm)
1310 nm wavelength 9.2±0.4 9.2±0.4 9.2±0.4 9.2±0.4 9.2±0.5 8.6±0.4 8.6±0.4
1550 nm wavelength 10.4±0.5 10.4±0.5 10.4±0.5 10.4±0.5 10.5±0.5 9.6±0.4 12.4±0.5 9.6±0.5 9.65±0.5
Macrobend Loss, dB, λ=1550 nm/1625 nm
(1 turn х R16.0 mm), dB 0.03/— 0.03/— 0.1/— 0.5/0.5
(1 turn х R10.0 mm), dB 0.5/1.5 0.5/1.5
(1 turn х R7.5mm), dB 0.4/0.8
(1 turn х R5.0 mm), dB 0.1/0.3
(100 turns х R30 mm), dB —/0.03 —/0.03 —/0.05 0.05/0.05 0.1/0.1
Fiber type “М” type “G” type
ОМ2 ОМ3 ОМ4 ОМ5 ОМ1
Fiber brand Corning® ClearCurve® OM2 Corning® ClearCurve® OM3 Corning® ClearCurve® OM4 Corning® ClearCurve® OM5 Corning® InfiniCor® 300
Standard ITU-T G.651 ITU-T G.651 ITU-T G.651 ITU-T G.651 IEC 60793-2-10
Dimensional Specifications
Core Diameter 50.0±2.5 50.0±2.5 50.0±2.5 50.0±2.5 62.5±3.0
Core-Clad Concentricity 1.5
Cladding Diameter 125±1 125±1 125±1 125±1 125±2
Cladding Non-Circularity 1
Coating Diameter 242±5
Maximum Attenuation (dB/km)
850 nm wavelength 2.3 2.3 2.3 2.3 2.9
953 nm wavelength 1.7
1300 nm wavelength 0.6
Numerical Aperture 0.200±0.015 0.200±0.015 0.200±0.015 0.200±0.015 0.275±0.015
Overfilled Bandwidth (MHz * km)
850 nm wavelength 700 1500 3500 3500 200
953 nm wavelength 1850
1300 nm wavelength 500
Effective Group Index of Retraction
850 nm wavelength 1.482 1.482 1.482 1.482 1.496
1300 nm wavelength 1.477 1.477 1.477 1.477 1.491
Attenuation to macrobending (2 turns on a bend former, radius of 15 mm), dB:
at a wavelength of 850 nm 0.1 0.1 0.1 0.1
at a wavelength of 1300 nm 0.3 0.3 0.3 0.3
Attenuation to macrobending (2 turns on a bend former, radius of 7.5 mm), dB:
at a wavelength of 850 nm 0.2 0.2 0.2 0.2
at a wavelength of 1300 nm 0.5 0.5 0.5 0.5