In the era of exploding data demands, hyperscale data centers and telecom networks require a connectivity backbone that blends speed, reliability, and scalability. Introducing the 400G QSFP-DD LR8 optical transceiver—your ultimate solution for seamless 10km transmission at 400Gbps, engineered to power the next generation of network infrastructure.

Figure 1, Etern Optoelectronics FLS400CLR8S_400G QSFP-DD LR8
Engineered for Unmatched Compatibility
At the core of this transceiver lies a design built for universal integration. Fully compliant with QSFP-DD MSA and IEEE 802.3cn 400GBASE-LR8 standards, it eliminates compatibility headaches, seamlessly integrating with mainstream models like QDD-400G-LR8-S and QDD-400G-LR8. Whether upgrading existing networks or building new ones, this module ensures plug-and-play simplicity, reducing deployment time and operational disruptions.
Its hot-pluggable 76-pin electrical interface adds another layer of convenience, allowing for quick installation and replacement without powering down the system—critical for maintaining 24/7 network uptime in mission-critical environments.
Precision Technology for Superior Performance
Powered by cutting-edge 8-lane parallel optics, the 400G QSFP-DD LR8 leverages 50Gbps PAM4 modulation on both electrical and optical sides, delivering a blistering maximum bit rate of 425Gbps. This advanced technology strikes the perfect balance between low latency and unwavering reliability, ensuring smooth data flow even for bandwidth-heavy applications like cloud computing, 5G backhaul, and high-performance computing.
Equipped with an 8-channel LAN-WDM (LWDM8) MUX/DEMUX design and dual LC duplex connectors, it operates at a central wavelength around 1310nm—optimized for long-haul transmission. With Forward Error Correction (FEC) support, it achieves a stable 10km reach over single-mode fiber (SMF), making it ideal for interconnecting data centers, linking metro network nodes, or bridging telecom hubs.
Built for Efficiency and Durability
Designed to thrive in real-world conditions, this transceiver operates flawlessly within a commercial temperature range of 0°C to 70°C, ensuring consistent performance in diverse environments—from air-conditioned data centers to outdoor telecom cabinets. Its maximum power consumption of just 14.5W combines high performance with energy efficiency, helping reduce long-term operational costs without compromising on speed.
For peace of mind, the module includes built-in digital diagnostic monitoring (DDM), allowing real-time tracking of critical parameters such as optical power, temperature, and voltage. This proactive monitoring capability enables network administrators to detect and resolve issues before they impact performance, maximizing network availability.
Trusted by the Market, Ready for Mass Deployment
As a mass-produced solution from Etern Optoelectronics (model FLS400CLR8S), the 400G QSFP-DD LR8 has proven its reliability in real-world applications. Its robust design, industry compliance, and seamless compatibility make it the go-to choice for organizations looking to future-proof their networks against growing data demands.
Whether you’re building a high-speed data center interconnect, enhancing 5G infrastructure, or upgrading metro networks, the 400G QSFP-DD LR8 delivers the speed, distance, and dependability you need. Step into the future of connectivity—choose a transceiver that doesn’t just meet standards, but sets them.
Ready to transform your network? Contact us today to learn how the 400G QSFP-DD LR8 can power your next big project.
For more information, visit Etern Optoelectronics website: https://www.szetern.com, or email to: sales@szetern.com