Is the 12-core fiber single-mode or dual-mode?

　　12-Core fiber can be single-mode or dual-mode, but single-mode is more common. Here is a detailed explanation of 12-core single-mode fiber and dual-mode fiber:

　　12-Core single-mode fiber

　　Definition: 12-core single-mode fiber refers to an outdoor communication cable built with 12 fibers (composed of silica and quartz glass), and these fibers are all single-mode fibers.

　　Features:

　　Single-mode fiber tranSMits only one mode of light, making it suitable for long-distance transmission.

　　It has the advantages of wide bandwidth, fast transmission speed, good confidentiality, anti-electromagnetic field interference, good insulation, long life and good chemical stability.

　　There are two common structural types: central bundle tube type and stranded stranded tube type.

　　Long transmission distance, low attenuation rate, suitable for long-distance communication and inter-office communication.

　　Parameter:

　　Fiber mode: single mode.

　　Number of cores: 12 cores.

　　Operating wavelengths: usually 1310nm and 1550nm.

　　Attenuation rate: At 1310nm wavelength, the typical attenuation rate is less than 0.4dB/km; at 1550nm wavelength, the attenuation rate is less than 0.2dB/km.

　　Temperature range: typically -40 ° C to + 60 ° C (up to + 70 ° C in some cases).

　　2. 12-core dual-mode fiber

　　Although the concept of 12-core dual-mode fiber exists in theory, it is not common in practical applications. Dual-mode fiber usually refers to the fiber that can simultaneously transmit two modes of light waves, but its application range and market demand are relatively small compared to single-mode fiber.

　　III. Summary

　　In summary, 12-core fiber can be single-mode or dual-mode, but according to market trends and application requirements, 12-core single-mode fiber is more common and widely used. When choosing a 12-core fiber, it should be selected according to the specific application requirements and the detailed specifications provided by the manufacturer. At the same time, it is also necessary to pay attention to the transmission performance, attenuation rate, temperature range and other parameters of the fiber, as well as the structure type and laying method.