We all know that the multi-mode 40G SR4 optical module adopts 4-way 10G parallel technology and MPO interface, and can use MPO-LC multi-mode OM3 fiber jumper and 10G SR for access。So are there any 40G optical modules that can be connected to single-mode 10G LR optical modules?In this article, ETU-LINK will introduce the next 40G optical module that can be interconnected with 10G LR optical module - 40G QSFP+ PSM4.

Some people may have questions. Both 40G LR4 and 10G LR have a transmission distance of 10KM, can they be interconnected?The answer is no, because 40G LR4 uses CWDM coarse wavelength division technology, and the working wavelengths are 1270, 1290, 1310, 1330nm, while the working wavelength of 10G LR is 1310nm. In addition, different transmission rates and interface types make them cannot be interconnected.

The 40G QSFP+ PSM4 optical module that can be interconnected with the 10G LR optical module , it is 4-channel 10G parallel technology, the interface type is MTP/MPO, and conforms to the 10G BASE-LR standard. 40G QSFP+ PSM4 can be split into 4 10G links using MPO-LC single-mode OS2 fiber jumpers for transmission, and can support connection with 4 10G LR optical modules.

ETU-LINK 40G QSFP+ PSM4 optical module needs to use single-mode OS2 optical fiber patch cord with 12-core MTP/MPO optical fiber connector, and the transmission distance can reach up to 10KM. With the continuous surge of data center traffic, in order to smoothly upgrade the transmission capacity of the data center, the use of 40G optical modules can help the data center achieve network upgrades.