800G QSFP-DD 2×FR4 2km Optical Transceiver 1310nm PAM4 Dual CS SMF Module

• Supports 800Gbps Ethernet optical transmission with 850Gbps aggregate bit rate
• Based on QSFP-DD Type 2A hot-pluggable form factor
• Integrates dual 400G FR4 optical links in a single module
• Supports transmission distances up to 2km over single-mode fiber
• Uses 1310nm PAM4 optical transmission technology
• Features eight 100G PAM4 EML optical transmitters
• Integrates eight 100G PAM4 PIN receivers
• Supports 800GAUI-8 retimed electrical interface
• Dual CS optical receptacles for high-density fiber connectivity
• Supports PAM4 modulation for improved bandwidth efficiency
• Integrated DOM monitoring for real-time diagnostics
• Low power operation with maximum consumption of ≤16W
• Supports hot-plug installation and simplified maintenance
• Designed for next-generation 800G Ethernet platforms
• Compliant with industry optical networking standards

• 800G Ethernet data center networks
• AI and GPU cluster interconnects
• Hyperscale cloud computing infrastructure
• Data Center Interconnect (DCI)
• High-performance computing (HPC)
• Enterprise backbone networks
• Large-scale switch-to-switch optical connections
• Next-generation Ethernet and optical communication systems

FiberMania provides OEM and ODM customization services for 800G QSFP-DD optical transceiver modules to support the requirements of cloud service providers, AI infrastructure companies, network equipment manufacturers, and system integrators.

What is the difference between 800G QSFP-DD 2×FR4 and 800G DR8 modules?

The 800G QSFP-DD 2×FR4 module combines two independent 400G FR4 optical links within one transceiver, typically using dual CS connectors and wavelength multiplexing technology. DR8 modules use eight parallel optical lanes through a single multi-fiber interface and are designed for different cabling architectures and deployment scenarios.

Why does this module use dual CS optical connectors?

Dual CS connectors provide two independent optical interfaces in a compact form factor, enabling two 400G FR4 links within a single QSFP-DD module. This improves port density and simplifies high-bandwidth fiber deployment in modern data centers.

What fiber type is required for the 800G QSFP-DD 2×FR4 module?

The module requires single-mode fiber (SMF), typically G.652 fiber. Single-mode fiber provides lower attenuation and better transmission performance for 800G links requiring distances up to 2km.

What advantages do EML transmitters provide in this 800G optical module?

EML transmitters offer excellent high-speed modulation performance, wavelength stability, and optical signal quality. They are widely used in high-capacity optical modules where reliable PAM4 transmission over longer distances is required.

Can this module support different transmission distances?

Yes. Depending on the optical configuration, variants can support different reach requirements, including DR8 500m, DR8+ 1km, and DR8++ 2km options. Customized configurations can be provided based on specific network requirements.