400G Optical
400G QSFP-DD DR4 Optical Module
400G DR4 is widely used for parallel single-mode data-center links and can also appear in breakout designs. Final selection must match the QSFP-DD host port, MPO cabling and target link topology.
Core link profile
400G QSFP-DD DR4 Optical Module
400GBASE-DR4 QSFP-DD project page for 500 m-class parallel single-mode links in data-center and AI network deployments.
Form factorQSFP-DD
Link class400GBASE-DR4
FiberParallel SMF
Reach500 m class*
Selection notes
✓Confirm the exact QSFP-DD host platform and supported 400G optics list.
✓Confirm native 400G or 4×100G / 2×200G breakout intent.
✓Confirm MPO polarity, patch-panel count and single-mode fiber path.
✓Validate FEC and interoperability before volume deployment.
Connector / cabling note
MPO-12 is common for 400GBASE-DR4; verify polarity and exact host implementation.
MPO-12 is common for 400GBASE-DR4; verify polarity and exact host implementation.
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.