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The 400G QSFP-DD LR4 Optical Transceiver delivers 400Gbps (4×100G) data rates over single-mode fiber with a 10km reach, utilizing CWDM4 technology and QSFP-DD form factor. Designed for Data Center Interconnect, enterprise networks, and 5G fronthaul or backhaul, it features low power consumption and high port density. Compliant with IEEE/MSA standards, this module ensures reliable performance for cloud computing and AI-driven infrastructure.
| Product Features |
●Compliant with IEEE 802.3bs standard:400GAUI-8 electrical interface ●Compliant with QSFP-DD MSA HW Rev 5.1 type 2 housing with duplex LC connector ●Compliant with QSFP-DD CMIS Rev 5.0 ●Operating distance at engineering link of up to 10km ●Maximum power consumption 9 W ●Case operating temperature 0℃to 70℃ ●Two wire serial Interface with digital diagnostic monitoring ●Complies with EU Directive 2011/65/EU (RoHS compliant) ●Class 1 Lase |
| Data Sheet |
| 400G-QSFP-DD-LR4-10km.pdf |
If you are interested in the 400G QSFP-DD LR4 10km, please contact us sales@c-light.com
400G QSFP-DD LR4 10km Transceiver FAQ
Q1: What is a 400G QSFP-DD LR4 10km transceiver?
A 400G QSFP-DD LR4 10km transceiver is a high-speed optical module that delivers 400Gbps Ethernet transmission over single-mode fiber using CWDM4 technology. It is designed for medium-reach data center and enterprise interconnects.
Key features include:
400Gbps data rate
CWDM4 optical technology
Up to 10km over SMF
Duplex LC connector
QSFP-DD form factor
It is ideal for DCI, cloud computing, AI infrastructure, and enterprise backbone networks.
Q2: How does a 400G QSFP-DD LR4 transceiver work?
The module transmits 4×100G PAM4 optical channels over a duplex single-mode fiber pair using CWDM wavelengths. It converts electrical signals into optical signals, providing high-bandwidth and low-latency connectivity for modern Ethernet networks.
Q3: What are the key features of the C-LIGHT 400G QSFP-DD LR4 10km transceiver?
The C-LIGHT module is designed for reliable long-distance 400G networking.
Key features include:
400Gbps transmission
Up to 10km over SMF
CWDM4 technology
IEEE 802.3bs compliant
QSFP-DD MSA Rev 5.1
CMIS Rev 5.0
Power consumption ≤9W
Digital Diagnostic Monitoring (DDM)
These features provide stable performance for high-density data center deployments.
Q4: What are the advantages of a 400G QSFP-DD LR4 transceiver?
Compared with shorter-reach optical modules, it offers:
Longer transmission distance
Higher bandwidth density
Low power consumption
Easy migration to 400G
High reliability
It is an efficient solution for medium-distance optical interconnects.
Q5: Where are 400G QSFP-DD LR4 transceivers commonly used?
These modules are widely deployed in high-speed optical networks.
Typical applications include:
Data Center Interconnect (DCI)
Cloud computing
AI data centers
Enterprise backbone networks
5G fronthaul and backhaul
Metro Ethernet
These applications require high bandwidth, low latency, and reliable 10km optical transmission.
Q6: Why choose a 400G QSFP-DD LR4 instead of a 400G FR4 module?
A 400G LR4 module supports up to 10km transmission, while FR4 is designed for 2km links. LR4 is better suited for campus, metro, and longer-distance data center interconnects.
Its advantages include:
Longer transmission reach
Reliable 10km connectivity
Duplex LC interface
Low power consumption
Excellent compatibility
It is ideal for medium-distance optical networks.
Q7: How do you choose the right 400G QSFP-DD LR4 transceiver?
When selecting a 400G LR4 module, consider:
Transmission distance
Fiber type
Connector type
Switch compatibility
Power consumption
IEEE/MSA compliance
Choosing the right module ensures stable network performance and future scalability.
Q8: Why choose the C-LIGHT 400G QSFP-DD LR4 10km transceiver?
The C-LIGHT 400G QSFP-DD LR4 combines high bandwidth, low power consumption, and reliable 10km transmission in a compact QSFP-DD package.
It provides:
400Gbps bandwidth
Up to 10km over SMF
CWDM4 optical technology
Power consumption ≤9W
Broad platform compatibility
It is an ideal solution for AI data centers, DCI, enterprise networks, cloud computing, and next-generation Ethernet infrastructure.
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