Laser-optimized multi-mode fibers (LOMMF) are the primary choice for short-reach data center interconnects within racks and between TOR switches. OM5 wideband multi-mode fiber supports Shortwave Wavelength Division Multiplexing (SWDM) across 850-950nm, enabling multiple wavelengths on a single fiber for 800G/1.6T transmission.
OM5 is the standard fiber for next-generation AI computing centers, supporting all-optical switching (OCS) clusters and 10,000-GPU scale data center deployments.
| Grade | Core | Bandwidth @850nm | 100G Reach | 400G/800G | Application |
|---|---|---|---|---|---|
| OM3 | 50μm | 2000 MHz·km | 100m | Limited | Legacy 10G/40G |
| OM4 | 50μm | 4700 MHz·km | 150m | 400G@100m | Current mainstream |
| OM5 | 50μm | 4700 MHz·km (wideband) | 150m | 800G/1.6T SWDM | Next-gen AI DC |
| Fiber Type | Wideband Laser-optimized Multi-mode Fiber (WBMMF) |
| Core Diameter | 50.0 ± 2.5 μm |
| Cladding Diameter | 125.0 ± 1.0 μm |
| Coating Diameter | 245 ± 10 μm |
| Effective Modal Bandwidth @850nm | ≥ 4700 MHz·km |
| Effective Modal Bandwidth @953nm | ≥ 2470 MHz·km |
| Attenuation @850nm | ≤ 3.0 dB/km |
| Attenuation @1300nm | ≤ 1.0 dB/km |
| Numerical Aperture | 0.200 ± 0.015 |
| Macrobend Loss (R=7.5mm, 2 turns) | ≤ 0.2 dB @850nm |
| 100GBASE-SR4 Reach | 100m |
| 400GBASE-SR4.2 Reach | 100m |
| 800G/1.6T SWDM4 Reach | 75-100m |