Three types of channels are needed in the fiber-based quantum secure communication network according to the function, the first is quantum channel for the transmission of light quantum signal, bare fiber is adopted currently; the second is interactive channel for the transmission of interactive information during quantum key distribution and management, network cable/ optical fiber / Wi-Fi can be used currently; the third is traffic channel for the transmission of user encrypted data and network cable/ optical fiber / Wi-Fi can be used currently.
In the particular scenarios, classical-quantum wavelength division multiplexing terminal can be used to integrate traffic channel, interactive channel and quantum channel into a bare fiber through wavelength division to realize the multiplexing of optical fiber resourceand reduce input cost and improve the utilization of bare fiber.