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400G OSFP112 and QSFP-DD
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400G OSFP112 and QSFP-DD

As 400G becomes the new backbone of cloud data centers, HPC clusters, and carrier edge nodes, your optical interconnect must deliver density, flexibility, and rock‑solid reliability. This 400G QSFP‑DD series does exactly that. Leveraging PAM4 modulation with an aggregated 400 Gbps bandwidth per module, the family complies with IEEE 802.3bs/db, 100G Lambda MSA, and the QSFP‑DD MSA Type 2 mechanical specification – ensuring seamless interoperability across mainstream switching platforms.
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Description

Technical Parameters

As 400G becomes the new backbone of cloud data centers, HPC clusters, and carrier edge nodes, your optical interconnect must deliver density, flexibility, and rock‑solid reliability. This 400G QSFP‑DD series does exactly that. Leveraging PAM4 modulation with an aggregated 400 Gbps bandwidth per module, the family complies with IEEE 802.3bs/db, 100G Lambda MSA, and the QSFP‑DD MSA Type 2 mechanical specification – ensuring seamless interoperability across mainstream switching platforms.

 

Six Models – One Reach for Every Link

 

The series spans three technology tracks (multi‑mode, parallel single‑mode, and CWDM multiplexing), giving you the freedom to match fiber infrastructure and distance requirements without over‑engineering.

Model

Technology

Reach

Fiber / Interface

Power (max)

Primary Use Case

SR4

850 nm VCSEL, parallel 4-ch

70 m (OM3) / 100 m (OM4)

MPO-12

8 W

In-rack / top-of-rack switching

SR8

850 nm VCSEL, parallel 8-ch

100 m (OM3)

MPO-16

8 W

High-density short-reach leaf-spine

DR4

1310 nm EML, 4-lane parallel

500 m

MPO-12 (SMF)

~8-9 W

Campus building / DC zone interconnect

DR4+

1310 nm EML, 4-lane parallel

2 km

MPO-12 (SMF)

~9 W

Intra-campus aggregation

FR4

CWDM4 (1271-1331 nm)

2 km

LC duplex (SMF)

~9-10 W

Regional DC-to-DC, 5G midhaul

LR4

CWDM4 (1271-1331 nm)

10 km

LC duplex (SMF)

~10-11 W

Metro access, inter-site backbone

 

Engineered for Performance and Scale

 

Native PAM4 + DSP Gearbox – Built‑in high‑performance DSP with 8‑channel CDR handles both retiming and FEC processing, offloading host resources and improving signal integrity.

400GAUI‑8 electrical interface – Fully compatible with existing QSFP28 ports, enabling a smooth in‑service upgrade from 100G to 400G without changing the line card.

Full digital diagnostics (DDM) – Monitor module temperature, supply voltage, per‑channel Tx/Rx power, and bias current in real time. Remote alerts and proactive maintenance become effortless.

 

Reliability That Never Wavers

 

Every 400G QSFP‑DD transceiver is qualified for 0 ~ 70 °C case temperature operation, with rigorous humidity and EMI testing. ESD protection meets HBM 1 kV (high‑speed pins) and 2 kV (control pins); all modules are Class 1 laser‑safe and RoHS compliant. Whether deployed in a high‑density leaf‑spine fabric or a remote edge POP, the series delivers 7×24 non‑stop performance with minimal bit‑error risk.

 

Where to Deploy

 

This 400G QSFP‑DD portfolio covers every major high‑speed networking scenario:

  • Cloud data center spine‑leaf architectures
  • AI/ML training clusters and high‑performance computing
  • Enterprise core networks and campus backbones
  • Carrier metro aggregation and 5G transport (mid‑/backhaul)
  • Inter‑data‑center interconnection (up to 10 km)

By combining a dense QSFP‑DD footprint, multi‑reach flexibility, and proven DSP‑based robustness, the 400G QSFP‑DD series gives you the lowest per‑bit cost while future‑proofing your optical infrastructure – from the server rack to the metro ring.

 

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