Can single-mode single fiber be sent and received?

　　Single-mode single fiber can send and receive. Single-mode single fiber uses one fiber for two-way communication, that is, sending and receiving operations simultaneously on the same fiber. This usually requires the use of special transceivers (such as BiDi transceivers) and wavelength division multiplexing (WDM) technology to achieve two-way communication.

　　Specifically, single-mode single-fiber transceivers tranSMit signals in both directions simultaneously through a single fiber, usually through wavelength division multiplexing technology implementation, that is, optical signals of different wavelengths are transmitted in the same fiber. Common wavelength division multiplexing technologies include coarse wavelength division multiplexing (CWDM) and dense wavelength division multiplexing (DWDM). In this way, one fiber can simultaneously undertake the task of sending and receiving data, thus saving fiber resources.

　　However, it should be noted that since single-mode single-fiber transceivers require the use of special BiDi transceivers and wavelength division multiplexing technologies, their initial cost may be higher. In addition, single-mode single-fiber transceivers from different manufacturers may have incompatibility when interconnecting, so careful consideration is required when choosing.

　　Overall, single-mode single-fiber transceivers can achieve two-way communication, but in practical applications, cost, compatibility, and specific application requirements need to be considered.