400G QSFP-DD LR4: Powering the Next Generation of Data Connectivity
Release date:Sep 17,2025

As global data traffic continues to surge, businesses and service providers are under constant pressure to upgrade their networks. Applications such as AI, cloud computing, streaming services, and 5G have dramatically increased the demand for high-speed, long-distance connections. Among the solutions driving this transformation, the 400G QSFP-DD LR4 optical module stands out as a reliable and scalable technology for next-generation infrastructures.


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Meeting the Need for High-Speed and Long-Distance Transmission

The QSFP-DD LR4 module supports 400Gbps Ethernet transmission over single-mode fiber up to 10km. This capability makes it particularly well-suited for data center interconnects, metro networks, and large-scale enterprise backbones. By adopting CWDM4 technology, the module transmits data efficiently across four wavelengths, ensuring both speed and signal integrity.


Advantages of the 400G QSFP-DD LR4

One of the defining advantages of this module is its ability to combine high bandwidth with low power consumption, a critical factor in today’s dense data center environments. Its hot-pluggable design means it can be installed or replaced without disrupting existing operations, offering flexibility and efficiency. Real-time monitoring features also give operators the ability to track performance metrics like temperature, voltage, and optical power, ensuring stable and reliable operation.

Compatibility is another strength. The 400G QSFP-DD LR4 is designed according to IEEE and MSA standards, meaning it integrates smoothly with equipment from major networking vendors. This interoperability reduces deployment risks and supports gradual network upgrades from lower-speed systems.


Enabling Modern Applications

The real-world applications of the 400G QSFP-DD LR4 are extensive. Cloud service providers rely on it to handle data-intensive workloads, while telecom operators use it to build robust metro and backbone networks. Enterprises with global operations can also leverage its capabilities to ensure seamless communication between campuses and regional offices.

For industries such as finance, healthcare, and research, where latency and reliability are critical, the 400G QSFP-DD LR4 delivers the performance needed to support mission-critical operations.


Why It Matters for the Future

The adoption of 400G technology represents a strategic investment in the future of digital infrastructure. By deploying 400G QSFP-DD LR4 modules, organizations can not only meet current bandwidth demands but also prepare their networks for the next wave of technological advancements. Whether it is AI-driven analytics, immersive virtual reality, or next-generation mobile services, the LR4 ensures that networks are ready to scale.


FAQ – 400G QSFP-DD LR4

Q1: What is the maximum reach of the QSFP-DD LR4?
A1: It supports up to 10km over standard single-mode fiber.

Q2: What kind of connector does it use?
A2: The module uses a duplex LC optical connector.

Q3: Is it suitable for high-density data centers?
A3: Yes, it is optimized for low power consumption and high-density deployment.

Q4: Which industries benefit most from this module?
A4: Data centers, telecom providers, cloud platforms, and enterprises with high bandwidth needs.

Q5: How does it support future growth?
A5: By offering 400Gbps capacity and standards-based design, it allows seamless scaling to meet future data traffic requirements.


Univiso ' s transceivers (SFPs) are designed to support multiple networks.

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