40G QSFP+LX4 Optical Module Introduction and Application Scheme

With the continuous increase of network bandwidth, many data centers have upgraded 10G networks to 40G. There are many solutions for 40G optical modules, such as 40G SR4 and 40G LR4.

Today, we will introduce an optical module that is suitable for upgrading 40G network on the basis of 10G network cabling. It is a 40G QSFP+LX4 optical module. Different from other 40G QSFP+optical modules, it can use either multi-mode optical fiber transmission or single-mode optical fiber transmission, and the interface type is duplex LC, which is suitable for upgrading 40G network cabling system from 10G.

The 40G QSFP+LX4 optical module adopts CWDM wavelength division multiplexing technology. Its operating wavelengths are 1271nm, 1291nm, 1311nm and 1331nm. It has four transmitting channels and receiving channels. If multimode OM4 fiber jumpers are used for transmission, it can be transmitted as far as 150m; If single-mode optical fiber jumper is used for transmission, it can be transmitted to 2km at most.

The biggest advantage of the 40G QSFP+LX4 optical module is to save costs for upgrading the 10G network to 40G. When the 40G link is deployed, the options for the short-range optical module are 40G QSFP+SR4 and 40G QSFP+eSR4. However, the interface type of these optical modules is MPO interface. When using these optical modules to upgrade the 40G network, it is bound to be re wired, which will undoubtedly increase the cost of network upgrading.