The ATOP 400G QSFP-DD FR4 CWDM 2km Transceiver is a high-quality 400G FR4 module designed for 2km optical communication applications and is compliant with the 100G Lambda MSA standard. This QSFP-DD module can convert 8-channel 53.125 GB/s electrical data to 4-channel 106.25 GB/s optical signals and multiplex them into a single channel for 425 GB/s optical transmission. Similarly, it optically demultiplexes a 425 GB/s input into 4-channel signals and converts them to 8-channel output electrical data on the receiver side, accessible via a two-wire serial interface.
Product Type
DR4
Form Factor
QSFP-DD
Data Rate
8*53.125Gbps
Wavelength
1271/1291/1311/1331nm
Component
EML+PIN
Output Power
-3.3~3.5dBm
Rec. Sens
-4.6dBm
Connector
LC
Case Temp.
C
Reach
2km
Max Power Consumption
12W
Application
Data Center
Protocol
Ethernet
Built for Deployment, Not Just Specification
ATOP products are engineered for real-world network environments where performance, compatibility, and long-term reliability matter.
Each product is designed, manufactured, and validated within ATOP’s factory-direct production ecosystem, ensuring consistency across batches, predictable availability, and dependable operation beyond initial deployment.
Compatibility & Ongoing Validation
This product is validated for interoperability with mainstream platforms and undergoes continuous review across firmware updates and production cycles.
Compatibility at ATOP is not a one-time certification. It is actively maintained to reduce deployment risk, prevent post-installation issues, and support stable operation as networks evolve.
Supply, Scale & Lifecycle Assurance
As a manufacturer, ATOP controls the full lifecycle of this product, from component sourcing and assembly through testing, traceability, and volume delivery.
Consistent performance across production runs
Predictable lead times and scalable supply
Long-term availability aligned with customer roadmaps
Traceability, Compliance & Sustainability
Each ATOP product is backed by full production traceability and compliance documentation, including ESG and regulatory requirements where applicable.
Factory-level visibility enables accurate reporting, audit readiness, and confidence in sourcing, without retroactive data collection or assumptions.
Part of a Broader Portfolio
This product represents one configuration within ATOP’s wider portfolio of optical transceivers and high-speed interconnect solutions. Variants, adjacent specifications, and alternative form factors may be available based on platform, reach, or deployment requirements.
If you don’t see an exact match, ATOP can advise on equivalent or optimized alternatives.
