Introduction
In high-speed network infrastructure, choosing the right type of fiber optic cable is essential for performance, cost-efficiency, and long-term scalability. This article explains the core differences between OS1 and OS2 singlemode fibers, as well as OM3, OM4, and OM5 multimode fibers—to help OEM clients, installers, and data center engineers make informed decisions.
As a professional fiber optic cable manufacturer and OEM supplier, Getek provides a full range of custom fiber cables that meet ISO/IEC and TIA standards, including EN 50173 , ISO/IEC 11801 , IEC 60793, ITU-T G.652 , G.657 etc.
OS1 vs OS2: What’s the Difference?
| Feature | OS1 | OS2 |
| Type | Tight-buffered | Loose-tube |
| Application | Indoor only | Indoor & Outdoor |
| Attenuation | ~1.0 dB/km @1310nm | ~0.4 dB/km @1310nm |
| Distance Support | Up to 10 km | Up to 200 km |
| Standards | ITU-T G.652.A/B | ITU-T G.652.C/D |
OS2 is an advanced version designed for long-distance and outdoor applications, commonly used in OEM backbone networks and data center connectivity. If you’re sourcing fiber cables from a custom fiber optic factory, ensure you specify OS2 for modern deployments.
OM1 vs OM2 vs OM3 vs OM4 vs OM5: Multimode Fiber Comparison
| Fiber Type | Core Diameter | Bandwidth (MHz·km) | Max Distance @ 1Gbps | Max Distance @ 10Gbps | Max Distance @ 40/100Gbps | Laser Optimized |
| OM1 | 62.5 µm | 200 @850nm | 275 m | 33 m | Not Supported | No |
| OM2 | 50 µm | 500 @850nm | 550 m | 82 m | Not Supported | No |
| OM3 | 50 µm | 2000 @850nm | 1000 m | 300 m | 100 m | Yes |
| OM4 | 50 µm | 4700 @850nm | 1000 m | 400–550 m | 150 m | Yes |
| OM5 | 50 µm | 4700 @850nm 2470 @953nm |
1000 m | 400–550 m | 150 m | Yes (SWDM Support) |
While OM3 and OM4 are widely used in legacy and current 10G/40G networks, OM5 is optimized for emerging short wavelength division multiplexing (SWDM) applications. When selecting fiber types for OEM production, fiber optic suppliers must evaluate customer needs, project scale, and future upgrade paths.
How to Choose the Right Fiber Type for OEM Projects
OS1: Ideal for indoor, short-distance runs in buildings.
OS2: Recommended for long-range connections between buildings or across campuses.
OM3/OM4: Cost-effective multimode fiber for enterprise LANs, 10G/40G links.
OM5: Future-proof solution for data centers using SWDM and high-density environments.
At GETEKnet, our fiber optic cable factory supports OEM/ODM customization for all types, including:
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OS2 patch cables (LC/SC/ST/MPO)
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OM4/OM5 trunk cables
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Armored, waterproof, and LSZH jacket options
We perform 100% insertion loss and return loss testing, ensuring that your cables meet international requirements.
FAQ
Q1: Is OS2 backward compatible with OS1?
A: Yes. OS2 fibers are typically backward-compatible with OS1, but optimal performance depends on proper splicing and connector quality.
Q2: Can I use OM3 cables for 40G Ethernet?
A: Yes, but only up to 100m. OM4 or OM5 is preferred for longer or denser 40G/100G deployments.
Q3: Does OM5 offer a real advantage over OM4?
A: OM5 supports SWDM and reduces fiber count in certain 100G/200G setups, but benefits depend on your switch and transceiver support.
Why Choose Getek as Your Fiber Optic Cable Manufacturer?
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2000㎡ factory with automated cable processing
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Monthly capacity: over 500,000 meters of fiber cables
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Certified ISO9001 production with IQC, IPQC, FOC and OQC inspection
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Global OEM clients in telecom, ISP, and data center sectors
👉 Looking for a reliable OEM fiber optic cable supplier? Contact GETEKnet today to discuss your specifications and get a custom quote.
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