QSFP-DD 400G SR8 100m MPO-16 Transceiver

The 400G QSFP-DD SR8 optical transceiver is a cutting-edge solution engineered to meet the escalating bandwidth demands of modern hyperscale data centers, AI/ML clusters, and cloud infrastructure. Leveraging advanced 8x50G PAM4 (Pulse Amplitude Modulation 4-level) signaling, this module aggregates 400Gbps throughput within a compact QSFP-DD (Quad Small Form-Factor Pluggable Double Density) form factor, ensuring backward compatibility with QSFP56 and QSFP28 ports.

Technical Specifications & Compliance
Compliant with the IEEE 802.3cm standard and QSFP-DD MSA guidelines, the SR8 transceiver employs 850nm vertical-cavity surface-emitting laser (VCSEL) arrays and high-sensitivity PIN photodiodes (PDs) to enable robust optical performance. It operates over OM3, OM4, or OM5 multi-mode fibers (MMF) via a 16-fiber MPO-16 connector, supporting distances up to 70m (OM3), 100m (OM4), and 150m (OM5). This flexibility makes it ideal for short-reach interconnects within racks or across adjacent rows in data centers.

Performance & Reliability
The module’s design prioritizes signal integrity and energy efficiency. With a raw pre-FEC (Forward Error Correction) bit-error rate (BER) of <2.4E-4, it leverages FEC algorithms to achieve a post-correction BER of ≤1E-12, ensuring near-error-free packet transmission. Its optimized power consumption (<10W) reduces thermal load, critical for high-density deployments in switches and routers.

Advantages Over Copper Alternatives
Compared to copper-based Direct Attach Cables (DACs), the 400G QSFP-DD SR8 offers significant benefits:

Longer Reach: DACs typically max out at 3-5m, while optical fiber supports 100m+ distances.

Weight & Flexibility: Lighter fiber cables simplify cable management and improve airflow.

EMI Immunity: Optical transmission eliminates electromagnetic interference risks in crowded data halls.

Applications

AI/ML Workloads: Supports low-latency communication between GPU/CPU clusters.

Cloud Networking: Enables spine-leaf architectures with scalable 400G uplinks.

High-Performance Computing (HPC): Facilitates rapid data exchange in supercomputing environments.

Future-Proof Design
The QSFP-DD SR8’s modularity aligns with evolving data center needs. Its dual-density interface doubles port capacity compared to traditional QSFP28, allowing seamless upgrades from 100G/200G to 400G infrastructure. Additionally, compatibility with breakout configurations (e.g., 4x100G or 8x50G) provides deployment versatility.

As data traffic surges exponentially, the 400G QSFP-DD SR8 optical transceiver stands as a cornerstone for next-generation networks. By combining high bandwidth, reliability, and energy efficiency, it addresses the challenges of 5G, IoT, and real-time analytics, empowering enterprises to scale sustainably while minimizing operational costs.

Parameter Of QSFP-DD 400G SR8 100m MPO-16 Transceiver