OM3 fiber is a laser‑optimized multimode fiber. This type of fiber uses an 850 nm VCSEL (Vertical‑Cavity Surface‑Emitting Laser) light source, has a core diameter of 50 μm, and features an aqua outer jacket. It can be used in Ethernet networks below 100 Gbps and is most commonly deployed in 10 Gigabit Ethernet. Compared with OM1 and OM2 fibers, OM3 offers higher transmission rates and greater bandwidth, so it is also referred to as optimized multimode fiber or 10G multimode fiber. OM3 (50/125 μm) graded‑index multimode fiber meets or exceeds the requirements of the ISO/IEC 11801-1 OM1 specification, the IEC 60793-2-10 A1-OM1 specification, and the TIA-492AAAF A1-OM1 specification.
• Optimized for 850nm VCSEL
• Compatibility with current OM3 multimode fibre
• Superior geometry uniformity
• Low attenuation
• High bandwidth
• Low differential mode delay (DMD) /p>
• High resistance to micro-bending
• Optimized performance in tight-buffer cable applications
• Stable performance over a wide range of environmental conditions
| Characteristics | Conditions | Specified Values | Units |
|---|---|---|---|
| Geometry Characteristics | |||
| Core Diameter | -- | 50±2.5 | [μm] |
| Core Non-Circularity | -- | ≤5.0 | [%] |
| Cladding Diameter | -- | 125.0±1.0 | [μm] |
| Cladding Non-Circularity | -- | ≤0.6 | [%] |
| Coating Diameter | -- | 245±7 | [μm] |
| Coating/Cladding Concentricity Error | -- | ≤10.0 | [μm] |
| Coating Non-Circularity | -- | ≤6.0 | [%] |
| Core/Cladding Concentricity Error | -- | ≤1.0 | [μm] |
| Delivery Length | -- | Up to 8.8 | [km/reel] |
| Optical Characteristics | |||
| Attenuation | 850nm | ≤2.4 | [dB/km] |
| 1300nm | ≤0.6 | [dB/km] | |
| -- | -- | OM3 Bend Insensitive | -- |
| Overfilled Modal Bandwidth | 850nm | ≥700/≥1500/≥3500 | [MHz·km] |
| 1300nm | ≥500/≥500/≥500 | [MHz·km] | |
| Effective Modal Bandwidth | 850nm | ≥950/≥2000/≥4700 | [MHz·km] |
| Application support distance on | -- | -- | -- |
| 40GBASE-SR4 / 100GBASE-SR10 | 850nm | -/140/170 | [m] |
| 10GBASE-SR | 850nm | 150/300/550 | [m] |
| 1000BASE-SR | 850nm | 750/1000/1100 | [m] |
| DMD Specification | Compliant with and more stringent than the requirements of IEC60793-2-10 | -- | -- |
| Numerical Aperture | -- | 0.200±0.015 | -- |
| Group Refractive Index | 850nm | 1.482 | -- |
| 1300nm | 1.477 | -- | |
| Zero Dispersion Wavelength(λ₀) | -- | 1295-1340 | [nm] |
| Zero Dispersion Slope(S₀) | 1295nm≤λ₀≤1310nm | ≤0.105 | [ps/(nm²·km)] |
| 1310nm≤λ₀≤1340nm | ≤0.000375(1590-λ₀) | [ps/(nm²·km)] | |
| Macrobending Loss | -- | -- | -- |
| 2 Turns @ 15 mm Radius | 850nm | ≤0.1 | [dB] |
| 1300nm | ≤0.3 | [dB] | |
| 2 Turns @ 7.5 mm Radius | 850nm | ≤0.2 | [dB] |
| 1300nm | ≤0.5 | [dB] | |
| Backscatter Characteristics 1300nm | |||
| Step（Mean of Bidirectional Measurement） | -- | ≤0.10 | [dB] |
| Irregularities Over Fibre Length and Point Discontinuity | -- | ≤0.10 | [dB] |
| Attenuation Uniformity | -- | ≤0.08 | [dB/km] |
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