the mobile communication base stations of operators also need Optical module to realize the interconnection between devices. The base stations have RRU and BBU devices. In applications, we need to connect the links of these two devices, which requires our Optical module and optical fiber jumpers. In the network, the devices used to connect BBU and RRU are mainly 1.25G Optical module, 2.5G Optical module, 10G Optical module, etc.