6 Things That Help You know About 400G Opitcal Transceiver

The continuous growth of global data traffic has promoted the development of data centers from 100G to faster, larger bandwidth and lower latency. 400G will be the direction of the next-generation backbone network upgrade and new construction and will become an inevitable trend in the development of data centers.


Many service providers have begun to deploy 400G network construction plans, such as Cisco and Huawei. In the process of constructing a 400G network system, 400G optical modules play a vital role. So, what is a 400G optical module? What is the difference between 10G, 25G, and 40G optical modules?

1. What is a 400G Optical Transceiver Module?

400G optical modules are mainly used for photoelectric conversion. Electrical signals are converted into optical signals at the transmitting end and then transmitted through optical fibers. At the receiving end, optical signals are converted into electrical signals. The 400G optical module has a transmission rate of 400G, which was born to adapt to the network market of 100M, 1G, 25G, 40G to 100G, 400G, and even 1T. 400G optical modules play a vital role and influence in the construction of 400G network systems.

2. What are the Common Form Factors of 400G Optical Modules?

  • OSFP

The full name of OSFP is Octal Small Formfactor Pluggable. This standard is a new interface standard and is not compatible with the existing optical interface. Its size is 100.4 * 22.58 * 13 mm ^ 3, which is slightly larger than the size of QSFP-DD and requires a larger PCB area.


QSFP-DD is an abbreviation of Quad Small Form Factor Pluggable-Double Density. This solution is an expansion of the QSFP interface, adding one lane to the original 4-channel interface to 8 channels, thus the so-called double density. This solution is compatible with the QSFP solution, which is one of its main advantages. The original QSFP28 module can still be used, just plug in another module.

3. What is the 400G Optical Transceiver Used For?

The main function of 400G optical modules is to improve data throughput and maximize the bandwidth and port density of the data center. The future trend of 400G optical modules is to achieve wide gain, low noise, miniaturization, and integration, and to provide high-quality optical communication modules for next-generation wireless networks and ultra-large data centers.

4. How Many Optical Chips Does a 400G Optical Module Need?

Although only one optical chip is used in the 400G optical module, the cost is high. In 10G/25G optical modules, the cost of optical chips accounts for about 30%; in 40G/100G optical modules, the cost of optical chips accounts for about 50%; and in 400G optical modules, the cost of optical chips is as high as 70%.

5. What is the Difference between 400G and 10G, 25G, 40G Optical Module?

Although 10G, 25G, 40G, and even 100G optical modules have become the mainstream of the market, as the requirements for bandwidth, port density, and system energy consumption continues to increase, 400G optical modules will further push the technology to a higher level of development.

Compared with 10G, 25G, and 40G optical modules, the arrival of 400G optical modules will enable optical communications to enter a new era. Optical communications are transforming from single-carrier modulation coherent detection of low-end optical modules to polarization multiplexing multi-carrier applications.

6. How is the Trend of the 400G Optical Modules Market?

As we all know, 100G technology products have embraced their maturity. 400G is currently a hot topic since the industry pays close attention to the progress of 400G optical modules. Today, the progress in the development and mass production of 400G optical modules is well underway. satisfactory. In the current market, the demand for bandwidth in ultra-large data centers is increasing, and 400G optical communication modules have become the best option for improving system performance and reducing bandwidth costs. The emergence of 5G networks will become another positive factor driving the market value of 400G optical modules.