G.657 series bend-insensitive single-mode fibers feature extremely low macro-bend loss, with minimum bend radius as small as 5mm (only 1/4 of standard G.652 fiber), making them ideal for tight space cabling environments where signal loss due to bending must be minimized.
With the explosive growth of AI computing centers, G.657.A2/B3 fibers have become the industry standard for high-density cabling in data centers, perfectly matching 400G/800G/1.6T silicon photonic modules and MPO high-density patch cords.
| Model | Min Bend Radius | Bend Loss @1550nm | Primary Application |
|---|---|---|---|
| G.657.A1 | 10 mm | ≤ 0.75 dB (1 turn) | Building horizontal cabling |
| G.657.A2 | 7.5 mm | ≤ 0.5 dB (1 turn) | Indoor drop cable, FTTH |
| G.657.B3 | 5 mm | ≤ 0.1 dB (1 turn) | AI Data Center, ODF high-density |
| ITU-T Standard | G.657.B3 (compatible with G.652.D) |
| Mode Field Diameter @1310nm | 8.8 ± 0.4 μm |
| Mode Field Diameter @1550nm | 9.9 ± 0.4 μm |
| Cladding Diameter | 125.0 ± 1.0 μm |
| Attenuation @1310nm | ≤ 0.35 dB/km |
| Attenuation @1550nm | ≤ 0.21 dB/km |
| Attenuation @1625nm | ≤ 0.24 dB/km |
| Macro-bend Loss @1550nm (R=5mm, 1 turn) | ≤ 0.1 dB |
| Macro-bend Loss @1625nm (R=5mm, 1 turn) | ≤ 0.2 dB |
| Zero Dispersion Wavelength | 1300 ~ 1324 nm |
| Proof Test Level | ≥ 100 kpsi |