Performance characteristics of outdoor single-mode optical cable
Single-mode optical fiber can support longer transmission distances than multi-mode optical fiber. From 100Mbps Ethernet to 1G Gigabit network, single-mode optical fiber can support more than 5000m. transmission distance.
The refractive index distribution is similar to that of mutant optical fiber, and the core diameter is only 8 ~10 μm, light propagates in a straight line along the central axis of the fiber core.Because this fiber can only transmit one mode (two polarization states are degenerate), it is called a single-mode fiber, and its signal distortion is very small.
What single-mode optical cables actually use for transmission is the intermediate core, called optical fiber.
That is, single-mode optical cable is composed of optical fiber + outer sheath + intermediate medium.
In fiber optic communications, single-mode fiber (SMF) is an optical fiber that directly transmits optical signals in a transverse mode.
Single-mode optical fiber runs at a data rate of 100M/s or 1G/s, and the transmission distance can reach at least 5 kilometers.
Single-mode optical fiber: The central glass core is very thin (the core diameter is generally 9 or 10 μm) and can only transmit one mode of optical fiber.
Therefore, its inter-mode dispersion is very small and is suitable for long-distance communications, but there are still material dispersions and waveguide dispersions. In this way, single-mode optical fiber has higher requirements for the spectral width and stability of the light source, that is, The spectrum width should be narrow and the stability should be good.
