400G Optical
400G FR4 Optical Module
400G FR4 uses wavelength multiplexing on duplex single-mode fiber, making it useful where a two-fiber link is preferred over parallel-fiber DR4. The exact module form factor and platform compatibility are confirmed per project.
Core link profile
400G FR4 Optical Module
400GBASE-FR4 optical module project page for duplex single-mode fiber and 2 km-class data-center interconnect links.
Link class400GBASE-FR4
FiberDuplex SMF
Reach2 km class*
ConnectorDuplex LC class*
Selection notes
✓Confirm the host form factor (for example QSFP-DD or QSFP112-class platform).
✓Confirm 2 km-class loss budget and the actual fiber path.
✓Confirm the device optics compatibility matrix before deployment.
✓Confirm required diagnostics, temperature range and labeling at RFQ stage.
Connector / cabling note
Duplex LC implementations are common; final form factor and connector must match the exact PN.
Duplex LC implementations are common; final form factor and connector must match the exact PN.
Project validation before quotation
Before we recommend an exact PN, send the host platform, port type, link topology, reach, quantity and required date.
01Platform
02Port / form factor
03Protocol / rate
04Fiber / cable
05Reach
06Quantity / date
Related product pages
Related product pages
Specifications shown here describe a common project starting point, not a binding quotation. Final PN, compatibility, connector, reach, diagnostics, labeling, availability and lead time are confirmed against the actual project.