The data shows that the growth rate of 10G and 40G ports is much higher than the low-speed growth rate. As the core technology and key part of the next-generation high-speed and large-capacity optical network, 40G optical module has high transmission rate and small size. Wide range of applications, the following ETU-LINK will introduce the next 40G optical module - 40G PSM4 optical module.

The 40G PSM4 optical module adopts the MPO interface, which transmits in parallel through 4 receiving and 4 transmitting channels, and the longest transmission distance is 10KM. Among the many 40G optical modules, the optical modules with MPO interface include SR4 and eSR4, but their transmission distance is relatively short. In MPO/MTP wiring, 40G PSM4 optical module can make up for the shortcomings of the other two modules that the transmission distance is not long enough.

Another usage of the MPO interface is to connect the 10G optical module through the MPO-4 *LC fiber patch cord, which can connect the original 4 10G ports with 1 40G port, so that the old low-speed equipment can be connected Connect to the new high-speed switch.

Although the transmission distance of 40G LR4 and 40G PSM4 optical modules are both 10KM, their production processes are quite different, mainly in the following aspects:

1. The working wavelength of 40G PSM4 is 1310nm, using parallel transmission, while 40G LR4 combines CWDM-DEMUX/MUX technology in TOSA and ROSA respectively, and the working wavelengths are 1270, 1290, 1310, 1330nm;

2. 40G PSM4 is MPO interface, while 40G LR4 is dual LC interface

3. The 40G PSM4 uses a COB packaging process, while the 40G LR4 uses a 4-channel integrated hermetic butterfly packaging process.

With the maturity of 40G optical modules, AOC active optical cables, and DAC high-speed cable products, functional design is no longer the main selling point of the industry, and cost performance and reliability have replaced it. In medium and long distance MPO/MTP wiring, ETU-LINK 40G PSM4 will become the first choice for customers with the advantages of high cost performance and high reliability.