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The difference between Coaxial cable and optical cable

author:kingsignal time:2017/08/14

Coaxial cable and optical cable The biggest difference is that the transmission speed, optical cable is much faster than the coaxial cable, of course, optical cable is the fastest transmission of a medium.

 

The coaxial cable consists of a hollow metal tube (outer conductor) 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 gasket. The coaxial cable used in the LAN has a total of 75Ω, 50Ω and 93Ω. RG59 75Ω cable is a standard cable used by the Common Antenna Television System (CATV). It is used to transmit analog signals generated by frequency division multiplexing (FDM). The frequency is up to 300 ~ 400MHz, which is called broadband transmission and can also be used to transmit digital signals The 50Ω coaxial cable sub-cable (RG-8 or RG-11 type) and thin cable (RG-58 type) two. Light cable anti-jamming performance is good, the transmission distance is far, thin cable price is low, transmission distance is close, the transmission rate is generally 10Mbps, suitable for and as well. RG-62 type 93Ω cable is Arcnet network coaxial cable, usually only applies to baseband transmission, transmission rate of 2 ~ 20Mbps.

 

Optical cable is the abbreviation of the optical fiber cable, which is the medium that transmits the optical signal. It is composed of the protective layer of the core, the cladding and the outer layer. Core is made of silicon dioxide doped with germanium, phosphorus and other materials, cylindrical. The outer cladding is made of pure silica, which refracts the optical signal into the core. Fiber single-mode and multi-mode two, single-mode only provides a light path, multi-mode with multiple light path, single-mode fiber capacity, the price is more expensive, the current single-mode fiber core cladding size of about 8.3μm / 125μm , Multi-mode core commonly used for 62.5μm / 125μm. Fiber can only be one-way transmission, for two-way communication, should be used in pairs. The domestic optical cable service speed has reached 100Mbps, and service providers that will eventually increase the number to 1Gbps to 10Gbps.

 

The above is a brief introduction to the difference between coaxial cable and optical cable, learn more about the contents of the optical cable, please pay attention to kingsignal official website.

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