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The difference between coaxial cable and fiber optic cable
The biggest difference between coaxial cable and fiber optic cable is the transmission speed. The optical fiber cable is much faster than the coaxial cable. Of course, the optical fiber cable is the fastest medium for transmission.
The coaxial cable is composed of a hollow metal tube (and a hard copper wire (inner conductor). The inner conductor is located in the center of the metal tube, and the inner and outer conductors are insulated with polyethylene plastic gaskets. Coaxial cables used in the LAN are shared 75 Ω, 50 Ω, and 93 Ω.The RG59 75Ω cable is a standard cable used in the CATV (Common Antenna Television System). It is often used to transmit analog signals generated by a frequency division multiplex FDM method at a frequency of 300 to 400 MHz. This is called broadband. Transmission, can also be used to transmit digital signals.50Ω coaxial cable sub-cable (RG-8 type or RG-11 type) and thin cable (RG-58 type) are two.Thick cable anti-interference performance, transmission distance is far , Thin cable price is low, the transmission distance is close, the transmission rate is generally 10Mbps, and it is suitable for the network.. RG-62 93Ω cable is the coaxial cable used in Arcnet network, usually only applicable to the baseband transmission, the transmission rate is 2 ~ 20M Bps.
Fiber optic cable is an abbreviation of optical fiber cable. It is a medium for transmitting optical signals. It consists of a core, a clad, and an outer layer of reinforced strength protective layer. The core is made of silicon dioxide doped with germanium, phosphorus and other materials, cylindrical. The outer layer is made of pure silica and refracts the light signal into the core. The optical fiber is divided into single-mode and multi-mode. The single-mode provides only one optical path, and the multi-mode has multiple optical paths. The single-mode optical fiber has large capacity and is more expensive. At present, the size of the single-mode optical fiber core is about 8.3 μm/125 μm. , Multimode core is commonly used for 62.5μm/125μm. Fibers can only be transmitted in one direction. If two-way communication is required, they should be used in pairs. The domestic optical cable service speed has reached 100Mbps, and service providers said that the number will eventually be increased to 1Gbps to 10Gbps.