BlueOptics Q28-AOC-25M-CO-BO InfiniBand fibre optic cable 25m OM3

The BlueOptics Q28-AOC-25M-CO-BO InfiniBand fibre optic cable 25m OM3 is an active optical cable (AOC) with QSFP28 connectors on both ends, designed for short-range 100G high-speed links inside and between racks. Featuring OM3 multimode fibre with a 50 µm core diameter and a 25 metre length, this cable converts electrical signals to optical and back via integrated transceiver modules in the QSFP28 housings. The cable is intended for low-latency, high-bandwidth applications and includes an LSZH (low smoke zero halogen) flame‑resistant jacket for improved safety in data-centre environments.

Advantages

The active optical design delivers 100GBASE-SR4-compatible performance with reduced weight and greater flexibility compared with direct-attach twinax solutions. Integrated I/O and O/E converters in the QSFP28 connectors provide hot-pluggable operation and reliable signal conversion over the full 25 m length. The OM3 multimode fibre and industry-standard QSFP28 MSA-compliant connectors enable high bandwidth, small bend radius and consistent interoperability with compatible hardware. The LSZH sheath reduces harmful emissions in case of fire while meeting relevant industry safety standards.

Suitable for

• Server-to-switch and switch-to-switch connections within racks or between adjacent racks
• 100GBASE-SR4 Ethernet and InfiniBand short-reach high-speed links
• Data centre cabling where reduced weight, flexibility and safety (LSZH) are required
• Environments requiring MSA-compliant QSFP28 interfaces and plug-and-play operation

Key specifications

• Length: 25 metres
• Connector type: QSFP28 to QSFP28 (hot-pluggable)
• Fibre type: OM3 multimode
• Core diameter: 50 µm
• Supported link standard: 100G (100GBASE-SR4) / InfiniBand short-reach
• Sheathing: LSZH (low smoke zero halogen), flame resistant
• Bend radius: small bend radius suitable for dense rack cabling (AOC design)

How to use

Ensure both devices support QSFP28 interfaces and are configured for the intended 100G or InfiniBand link. Insert each QSFP28 connector into the corresponding QSFP28 port until it latches; the built-in transceivers will perform electrical-to-optical and optical-to-electrical conversion automatically. Route the cable keeping bends gentle and within the manufacturer’s recommended bend radius; secure the cable to avoid strain on connectors. No separate transceiver modules or additional cabling are required for standard QSFP28-to-QSFP28 connections.

Recommendations

Use the cable for short-range high-bandwidth links inside or between adjacent racks and avoid long-term tight bends. Verify compatibility with host hardware and firmware, and follow data-centre safety and cable-management practices to maintain performance and longevity.