Product Overview

The QSFP-DD 400Gb/s Optical Transceiver Series is designed to support next-generation 400 Gigabit Ethernet networks with high-speed, reliable optical connectivity. Based on the QSFP-DD MSA standard, these modules provide flexible deployment options for hyperscale data centers, cloud computing, AI clusters, high-performance computing (HPC), enterprise backbone networks, and telecom infrastructures.

Supporting multiple transmission distances from 100 meters to 120 kilometers, the series includes multimode, single-mode, and coherent optical solutions to satisfy a wide range of networking requirements.

Product Specifications

Form Factor

• QSFP-DD (Quad Small Form-Factor Pluggable Double Density)

Data Rate

• 400Gb/s Ethernet

Electrical Interface

• 8 × 53.125Gb/s PAM4

Optical Interface

• 8 × 53.125Gb/s PAM4

• 4 × 106.25Gb/s PAM4

• 400G DP-16QAM (Coherent Models)

Transmission Distance

• 100 m

• 200 m

• 500 m

• 2 km

• 10 km

• 30 km

• 40 km

• Up to 120 km (ZR)

Optical Connectors

• MPO-12

• MPO-16

• Duplex LC

Operating Temperature

• Commercial: -5°C to +75°C

• Extended temperature options available

Compliance

• QSFP-DD MSA

• CMIS 4.0 or later

• RoHS Compliant

• Hot-Pluggable

Product Features

High-Speed 400G Connectivity

The QSFP-DD transceiver supports 400 Gigabit Ethernet transmission with high bandwidth and low latency, making it suitable for modern high-capacity optical networks.

Multiple Optical Architectures

Available in SR4, SR8, eSR8, DR4, FR4, LR4, LR8, ER4, ER8, ZR, and breakout versions, allowing flexible network deployment from short-reach data center interconnects to long-distance metropolitan transmission.

Broad Transmission Distance

The product portfolio covers transmission distances from 100 meters over multimode fiber to 120 kilometers over single-mode fiber, enabling deployment across various networking environments.

Flexible Breakout Support

Selected models support breakout applications, including:

• 4 × 100G

• 2 × 200G

• 8 × 50G

This provides greater flexibility for network migration and bandwidth expansion.

Excellent Compatibility

Designed according to QSFP-DD MSA specifications, the modules offer excellent interoperability with major networking platforms and switches.

Low Power Consumption

Optimized optical and electrical design helps reduce power consumption while maintaining stable high-speed transmission performance.

Available Product Series

The QSFP-DD 400G family includes a complete range of optical modules for different transmission requirements.

Short-Reach Multimode

• QDD-400G-SR4

• QDD-400G-SR4.2

• QDD-400G-SR8

• QDD-400G-eSR8

Parallel Single-Mode

• QDD-400G-DR4

• QDD-4×100G-FR

• QDD-4×100G-LR

Duplex LC Solutions

• QDD-400G-FR4

• QDD-400G-LR4

• QDD-400G-LR8

• QDD-400G-ER4L

• QDD-400G-ER4

• QDD-400G-ER8

Coherent Transmission

• QDD-400G-ZR

Breakout Modules

• QDD-2×100G-SR4

• QDD-2×100G-CWDM4

• QDD-2×100G-LR4

Typical Applications

The QSFP-DD 400G optical transceiver series is widely deployed in:

• Hyperscale Data Centers

• Cloud Computing Networks

• AI Computing Clusters

• High Performance Computing (HPC)

• Spine-Leaf Data Center Architecture

• Enterprise Core Networks

• Metro Optical Networks

• Telecommunications

• Internet Service Providers

• Storage Area Networks

• Data Center Interconnect (DCI)

• 400G Ethernet Backbone Networks

Product Advantages

• Supports 400Gb/s Ethernet transmission

• QSFP-DD MSA compliant

• 8-lane PAM4 electrical interface

• Hot-pluggable design

• Low power consumption

• High-density deployment

• Multiple optical interface options

• Transmission distance from 100 m to 120 km

• Breakout capability for flexible network expansion

• Excellent compatibility with mainstream networking equipment

• Reliable performance for mission-critical data transmission

Installation & Maintenance Guidelines

To ensure stable performance and extend module service life, the following recommendations are advised:

Electrostatic Protection

• Wear an ESD wrist strap or anti-static gloves before handling optical modules.

• Store unused modules in anti-static packaging.

Fiber Handling

• Clean fiber connectors before installation using fiber optic cleaning tools.

• Keep dust caps installed whenever optical ports are not in use.

• Avoid excessive bending of optical patch cords.

Module Installation

• Insert the module gently until it locks securely into the port.

• Verify proper orientation before insertion.

• Do not force the module into the cage.

Optical Safety

• Never look directly into active optical ports or fiber ends.

• Disconnect the optical signal before maintenance.

• Follow standard laser safety procedures during installation and servicing.

Routine Maintenance

• Regularly inspect and clean optical connectors.

• Replace damaged fiber patch cords immediately.

• Check optical power levels before connecting long-distance modules.

• Use optical attenuators where required to prevent receiver overload.

OEM & ODM Services

We provide flexible OEM and ODM services for optical communication equipment, including:

• Private Label Branding

• Customized Product Labels

• EEPROM Coding & Vendor Compatibility

• Customized Firmware

• Performance Testing

• Packaging Design

• Barcode & Serial Number Management

• Compatibility with Major Network Equipment Brands

• Customized Optical Solutions

• Technical Documentation Support

The QSFP-DD 400Gb/s Optical Transceiver Series is an ideal choice for network equipment distributors, telecom operators, cloud service providers, system integrators, and data center solution providers seeking high-performance, standards-compliant 400G optical connectivity with flexible deployment options.