Types of Optical Fibres
13.06.2025
Content:
SINGLE-MODE FIBRES
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| Type of PA according to ITU-IT | Inventory | Maximum attenuation of optical fibre, dB/km | ||||||||||||||||||||||
| 1310 nm | 1383 nm | 1410 nm | 1450 nm | 1490 nm | 1550 nm | 1625 nm | ||||||||||||||||||
| G.652.D analogue OS2 |
Standard single-mode optical fibre with zero attenuation at “peak water”* |
≤ 0.34 | ≤ 0.31 | – | – | ≤ 0.24 | ≤ 0.20 | ≤ 0.23 | ||||||||||||||||
| G.652.D LL (Low Loss) |
Single-mode premium optical fibre with reduced loss by “and reduced attenuation over the entire optical range |
≤ 0.32 | ≤ 0.31 | – | – | ≤ 0.21 | ≤ 0.18 | ≤ 0.20 | ||||||||||||||||
| G.655 – А, В, С, D | Long-distance single-mode optical fibre with non-zero bias dispersion for CWDM and DWDM systems with 10G, 40G and 100G spectral compression | – | ≤ 0.40 | ≤ 0.32 | ≤ 0.26 | – | ≤ 0.19 | ≤ 0.21 | ||||||||||||||||
| G.657.А1 | Micro-bend resistant single-mode optical fibre in full compliance with G.652.D, minimum bend radius 10-15 mm | ≤ 0.35 | ≤ 0.35 | – | – | ≤ 0.24 | ≤ 0.20 | ≤ 0.23 | ||||||||||||||||
| G.657.А2 | Micro-bend resistant single-mode optical fibre in full compliance with G.652.D, minimum bend radius 7.5 mm | ≤ 0.35 | ≤ 0.35 | – | – | ≤ 0.24 | ≤ 0.20 | ≤ 0.23 | ||||||||||||||||
| G.657.ВЗ | Micro-bend resistant single-mode optical fibre in full compliance with G.652.D, minimum bend radius 5 mm | ≤ 0.35 | ≤ 0.35 | – | – | ≤ 0.24 | ≤ 0.20 | ≤ 0.23 | ||||||||||||||||
| G.657.ВЗ Plus | Micro-bend resistant single-mode optical fibre with full compliance with G.652.D standard for connectors, minimum bend radius 2.5 mm. | ≤ 0.35 | ≤ 0.35 | – | – | ≤ 0.24 | ≤ 0.21 | ≤ 0.23 | ||||||||||||||||
* The “water peak” separates the transparency windows in the 1300 nm and 1550 nm bandwidths of single-mode light guides.
MULTIMODE FIBRES:
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| Type of PA according to ITU-T | Bandwidth, MHz/km | Transmission distance, m | Attenuation, dB/km | Bending loss, 2 turns, dB | Bending loss, 10 turns, dB | |||||||||||||||||||
| 850 nm | 1300 nm | 1GBase-SR | 10GBase-SR | 40GBase-SR4 / 100GBase-SR10 |
850 nm | 1300 nm | Radius 7.5 mm | Radius 15 mm | Radius 30 mm | |||||||||||||||
| 850 нм | 1300 nm | 850 nm | 1300 nm | 850 nm | 1300 nm | |||||||||||||||||||
| 62.5/125 ОМ1 | ≥ 160 | ≥ 500 | 275 | – | – | 2,6 | 0,5 | – | ≥ 0.5 | |||||||||||||||
| 50/125 ОМ2 resistant to micro bends |
≥ 500 | ≥ 500 | 600 | 83 | – | 2,3 | 0,5 | ≥ 0.2 | ≥ 0.5 | ≥ 0.1 | ≥ 0.3 | – | ||||||||||||
| 50/125 ОМЗ resistant to micro bends |
≥ 1500 | ≥ 500 | 1000 | 300 | 140 | 2,4 | 0,5 | ≥ 0.2 | ≥ 0.5 | ≥ 0.1 | ≥ 0.3 | – | ||||||||||||
| 50/125 ОМ4 resistant to micro bends |
≥ 3500 | ≥ 500 | 1100 | 550 | 170 | 2,4 | 0,6 | ≥ 0.2 | ≥ 0.5 | ≥ 0.1 | ≥ 0.3 | – | ||||||||||||
RESISTANCE TO BENDING
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| G.652.D аналог OS2 |
Bending radius 30mm, 100 turns 1550/1625nm ≤0.03dB | Bending radius 25mm, 100 turns 1310/1550nm ≤0.03dB | Bending radius 15mm, 10 turns 1550nm ≤0.25dB, 1625nm ≤1.0dB | |||||||||||||||||||||
| G.652.D LL (Low Loss) |
Bending radius 30mm, 100 turns 1550/1625nm ≤0.03dB | Bending radius 25mm, 100 turns 1310/1550nm ≤0.03dB | Bending radius 15mm, 10 turns 1550nm ≤0.25dB, 1625nm ≤1.0dB | |||||||||||||||||||||
| G.655 – А, В, С, D | Bending radius 30mm, 100 turns 1550/1625nm ≤0.05dB | Bending radius 15mm, 1 turn 1550/1625nm ≤0.5dB | ||||||||||||||||||||||
| G.657.А1 | Bending radius 15mm, 10 turns 1550nm ≥0.2dB, 1625nm ≤0.5dB | Bending radius 10mm, 1 turn 1550nm ≥0.5dB, 1625nm ≤1.5dB | ||||||||||||||||||||||
| G.657.А2 | Bending radius 15mm, 10 turns 1550nm ≥0.03dB, 1625nm ≤0.1dB | Bending radius 10mm, 1 turn 1550nm ≥0.1dB, 1625nm ≤0.2dB | Bending radius 7.5mm, 1 turn 1550nm ≥0.5dB, 1625nm ≤1.0dB | |||||||||||||||||||||
| G.657.ВЗ | Bending radius 10mm, 1 turn 1550nm ≥0.03dB, 1625nm ≤0.1dB | Bending radius 7.5mm, 1 turn 1550nm ≥0.05dB, 1625nm ≤0.15dB | Bending radius 5mm, 1 turn 1550nm ≥0.1dB, 1625nm ≤0.3dB | |||||||||||||||||||||
| G.657.ВЗ Plus | Bending radius 5mm, 1 turn 1550nm ≥0.1dB, 1625nm ≤0.2dB | Bending radius 2.5mm, 1 turn 1550nm ≥0.2dB, 1625nm ≤0.3dB | ||||||||||||||||||||||
FUELING dB/km
MAXIMUM ATTENUATION DEPENDING ON THE BENDING RADIUS 1550nm and 1625нм
BENDING COSTS and 130Эnm
PERMISSIBLE BENDING RADIUS, MM
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