The difference between single-mode fiber optic cable and multimode fiber optic cable is as follows. The actual transmission of single-mode fiber optic cable is the intermediate core, called optical fiber. That is, the single-mode optical cable is composed of optical fiber + outer sheath + intermediate medium. In fiber optic communications, a single-mode fiber (SMF) is a fiber that directly transmits optical signals in the transverse mode. Single-mode fiber operates at a data rate of 100M/s or 1G/s, and the transmission distance can reach at least 5 kilometers.
Single-mode fiber: The central glass core is very thin (core diameter is typically 9 or 10 μm), and the fiber can only transmit one mode. Therefore, its intermodal dispersion is very small, suitable for long-distance communication, but there are also material dispersion and waveguide dispersion, so single-mode fiber has higher requirements on the spectral width and stability of the light source, that is, the spectral width should be narrow and Stablize. be good.
Multimode fiber optic cables are primarily used for short-distance fiber optic communications, such as within buildings or campuses. The typical transmission speed is 100M/s, the transmission distance can reach 2km, 1G/s can reach 1000m, and 10G/s can reach 550m. There are two types of refractive index: graded index and step index.
Multimode Fiber: An optical fiber that transmits multiple modes at a given operating wavelength.
According to the distribution of its refractive index, it is divided into sudden type and gradual type. Since there are hundreds of modes transmitted in a multimode fiber, the propagation constants and group velocities of each mode are different, which makes the fiber have narrow bandwidth, large dispersion and large loss. It is only suitable for short-to-medium distance and small-capacity optical fiber communication systems.
What is the difference between single-mode fiber optic cable and multimode fiber optic cable?
Model: GYFTY, GYFTZY are generally multi-mode; GYXTW, GYTS are generally single-mode.
Color: Indoor multi-mode optical cable is orange, indoor single-mode optical cable is yellow.
Identification: MM is multi-mode, SM is single-mode.
Transmission mode: It is distinguished according to the transmission mode of light in the optical fiber.
