As global data consumption accelerates, the demand for high-speed, long-distance optical connectivity is stronger than ever. Data centers, telecom operators, and cloud providers are continuously seeking solutions that balance capacity, performance, and scalability. Among the cutting-edge innovations shaping this landscape, the 400G QSFP-DD LR4 10km optical transceiver stands out as a reliable choice for large-scale, high-density networking.

Why 400G QSFP-DD LR4 Matters

The QSFP-DD (Quad Small Form-Factor Pluggable Double Density) standard was designed to support 400G Ethernet applications in a compact, high-density form. The LR4 variant, specifically engineered for 10km transmission over single-mode fiber (SMF), enables seamless connectivity between data centers, metropolitan networks, and large enterprise backbones.

For network architects, this means fewer bottlenecks, smoother scaling, and lower cost per bit. With 400G LR4, organizations can extend their reach without sacrificing speed or efficiency.

Key Features at a Glance

• Data Rate: 400Gbps, supporting 4x100G channels via CWDM wavelengths (1271–1331nm).

• Transmission Distance: Up to 10km over standard G.652 SMF.

• Interface: Duplex LC optical connector, simplifying deployment.

• Compatibility: Compliant with IEEE 802.3bs 400GBASE-LR4 standard.

• Power Efficiency: Designed for high-density racks with optimized energy consumption.

• Applications: Ideal for hyperscale data centers, cloud computing, and telecom backbone networks.

These features position the 400G QSFP-DD LR4 module as not just a product, but a long-term investment in network resilience.

Applications in Modern Networks

1. Data Center Interconnect (DCI): Ensures high-capacity links between campuses or metro areas.

2. 5G & Beyond: Supports the backbone infrastructure required for next-generation mobile services.

3. Cloud Infrastructure: Meets the performance needs of AI, big data analytics, and distributed workloads.

4. Enterprise Core Networks: Provides future-ready connectivity for organizations undergoing digital transformation.

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The Value Proposition

By leveraging CWDM technology across four wavelengths, this module reduces the number of fibers needed while maintaining exceptional transmission performance. Combined with low insertion loss and stable operation, it offers both cost efficiency and technical robustness.

For companies scaling their network, investing in 400G QSFP-DD LR4 10km translates into lower operational costs, simplified maintenance, and reliable performance for years to come.

FAQ about 400G QSFP-DD LR4 10km

Q1: What is the maximum transmission distance of 400G QSFP-DD LR4?
A1: It supports up to 10km over single-mode fiber (SMF).

Q2: Which networks benefit most from this module?
A2: Hyperscale data centers, telecom operators, cloud providers, and enterprise backbones.

Q3: Is it compatible with existing 100G or 200G infrastructure?
A3: Yes, the QSFP-DD LR4 design is backward-compatible, ensuring smooth migration from lower speeds.

Q4: What connector type does it use?
A4: Duplex LC connector, widely adopted for single-mode transmission.

Q5: How does it support energy efficiency?
A5: With optimized power consumption and high-density form factor, it helps reduce rack space and operational energy costs.