The Huawei QSFP-DD 400G SR8 is a high-performance multimode optical transceiver designed for 400Gbps Ethernet over short-reach multimode fiber, supporting distances up to 100 meters on OM4 fiber.

Key Specifications

• Form Factor: QSFP-DD (Quad Small Form Factor Pluggable Double Density), enabling high port density in data center switches and routers .
• Data Rate: 400Gbps, supporting high-speed data transmission for modern networking applications .
• Interface Type: 400GBASE-SR8, an 8-lane short-reach multimode fiber interface .
• Wavelength: 850nm, standard for multimode fiber applications, ensuring efficient short-distance transmission .
• Reach: Up to 100 meters on OM4 multimode fiber and 70 meters on OM3 multimode fiber, suitable for intra-data center connections .
• Connector Type: MPO 1×16, allowing multiple fibers to be connected in a compact form factor .
• Connector Finish: APC (Angled Physical Contact), which reduces back reflection and improves signal integrity .
• Modulation Format: 4-level Pulse Amplitude Modulation (PAM4), enabling higher data throughput over parallel fiber lanes .
• Standards Compliance: QSFP-DD MSA, IEEE 802.3cm 400GBASE-SR8, and IEEE 802.3bs 400GAUI-8, ensuring interoperability with other compliant devices .
• Digital Diagnostics: Available via I2C interface, allowing real-time monitoring of module parameters such as temperature, voltage, and optical power .

Applications

The Huawei QSFP-DD 400G SR8 multimode module is primarily used in:

• Data Centers: For high-density, short-reach interconnections between switches, servers, and storage systems.
• High-Speed Networking: Supporting 400GbE links in AI, cloud computing, and enterprise network environments.
• Parallel Optical Links: Utilizing 8 fiber pairs to achieve 400Gbps throughput efficiently over multimode fiber .

Advantages

• High Port Density: QSFP-DD form factor allows more ports per switch, saving rack space.
• Short-Reach Optimization: Ideal for intra-rack and inter-rack connections within data centers.
• Reliable Signal Integrity: APC connectors and PAM4 modulation reduce errors and improve performance.
• Plug-and-Play: Compact and cost-effective solution for rapid deployment in modern network infrastructures . The Huawei QSFP-DD 400G SR8 multimode optical module provides a robust, high-speed, and space-efficient solution for short-reach 400G Ethernet applications, making it a key component in next-generation data center networks.