In-Depth Analysis of QSFP-DD 400G FR4 Transceivers

400G QSFP-DD has become one of the most popular transceivers in large-scale data centers due to their advantages of low power consumption, small size, and high speed. Among them, the QSFP-DD 400G FR4 transceiver is the first choice for medium and long-distance solutions in 400G data centers. This article will explain the working principles, advantages, and application scenarios of 400G FR4 optical transceivers, as well as the differences between QSFP-DD 400G FR4 and 400G FR8 modules.

What is a 400GBASE-FR4 QSFP-DD Optical Transceiver?

400G QSFP-DD FR4 is one of the common 400G modules. It is designed with hot-swappable QSFP-DD packaging and complies with QSFP-DD MSA and IEEE 802.3cu 400GBASE-FR4 Ethernet standards. It incorporates 4 independent lanes on CWDM4 center wavelengths of 1271/1291/1311/1331nm running at 100Gbps per lane and compliant with the 100G Single Lambda MSA specification.

400GBASE-FR4 QSFP-DD optical transceivers can transmit up to 2km through single-mode fiber (SMF) with a duplex LC connector and provide the bandwidth of 400 Gigabit Ethernet (400GbE), they are an ideal choice for medium and long-distance solutions in 400G data centers. 

How Does the QDD-400G-FR4-S Optical Module Work?

The 400G signal is transmitted across 4 CWDM optical wavelengths, each supporting a data rate of 106.25Gbps using PAM4 modulation. On the transmitter side, the QDD-400G-FR4-S transforms the 8 lanes of 50G PAM4 electrical signals into 4 CWDM optical channels, which are then multiplexed into a single 400G signal. On the receiver side, the module demultiplexes the 400G input signal into 4 CWDM optical channels and converts them back into 8 lanes of 50G PAM4 electrical signals for output.

Application Scenarios of 400G Transceiver FR4 QSFP-DD

As a high-speed data transmission module, the 400G transceiver FR4 QSFP-DD optical module has key features such as excellent bandwidth density and a low-power consumption design. It will play an important role in data center networks, communication networks, enterprise networks, and other fields.

In data center networks, 400G FR4 QSFP-DD optical modules can be used to achieve high-speed interconnection between servers and switches to meet the needs of large-scale data centers for high bandwidth and low latency, especially in cloud computing and big data processing environments, which can effectively improve data transmission efficiency.

In communication networks, 400G FR4 transceivers support medium and long-distance transmission, which is suitable for the high-speed connection requirements of backbone and metropolitan area networks. Through its superior transmission performance and low power consumption design, 400G FR4 QSFP-DD optical modules can help operators optimize network architecture and reduce overall operating costs.

In enterprise networks, this QDD-400G-FR4-S module can provide high-speed and stable network connections for industries such as finance, medical care, and education, support application scenarios such as high-performance computing, remote collaboration, and large file transfer, and provide reliable support for enterprise digital transformation.

Why Choose QDD 400G FR4 for 400G Data Center?

For 400G data centers, it is vital to choose an optical module with excellent performance and cost-effectiveness. QDD 400G FR4 optical module relies on its outstanding technical characteristics to provide a stable and reliable solution while meeting the needs of 400G networks. The following are the advantages of 400G FR4 in data centers.

Flexibility

The 400G FR4 transceivers offer a variety of applications, with common connections in data centers such as 400G to 400G direct connectivity, 800G 2FR4 OSFP to 2x 400G-FR4 QSFP-DD breakout connectivity, and QSFP-DD 800G 2FR4 to QSFP-DD 2x 400G-FR4 breakout connectivity, making it easy for data centers to optimize and upgrade their networks. 

400G to 400G Direct Connectivity:

800G 2FR4 OSFP to 2x 400G-FR4 QSFP-DD Breakout Connectivity;

QSFP-DD 800G 2FR4 to QSFP-DD 2x 400G-FR4 Breakout Connectivity;

Excellent Bandwidth

QDD 400G FR4 optical transceivers provide superior bandwidth performance and support data rates up to 400Gbps to meet the demand for ultra-high speed data transmission in modern data centers.

Low-power Consumption Design

In communication networks, with the continuous expansion of mobile communications, broadband access and other services, the high-speed data transmission demand is also increasing. The QDD-400G-FR4-S optical modules adopt a low-power design, effectively reducing energy consumption, and aligning with the trend of sustainable development.

Strong Compatibility

The QDD-400G-FR4-S optical modules are equipped with a universal connector standard and are compatible with existing optical fiber communication equipment, enabling smooth upgrades. It can provide stable and reliable network connections for enterprises' daily business operations.

QSFP-DD FR4 VS FR8 400G Transceiver, What's the Difference?

Before explaining the difference between 400G FR4 vs 400G FR8, we will first introduce what a 400G FR8 transceiver is.

The 400G QSFP-DD FR8 optical module uses 50G PAM4 modulation technology and transmits data through 8 channels, each channel supports a transmission rate of up to 53.125Gbps, and the total transmission rate can reach 400Gbps. 400G QSFP-DD FR8 optical transceiver can be used for medium and long-distance transmission, with a maximum transmission distance of 2KM. 

So what is the difference between 400G FR8 and 400G FR4? The following table explains in detail.