Optical fiber is a shorthand for optical fiber. It is a fiber made of glass or plastic and can be used as a light-conducting tool. The transmission principle is 'total reflection of light'. Former Hong Kong Chinese University President Gao Wei and George A. Hockham first proposed the idea that fiber can be used for communication transmission, so Gao Hao won the 2009 Nobel Prize in Physics.
The tiny fiber is encapsulated in a plastic sheath so that it can bend without breaking. Typically, the emitting device at one end of the fiber transmits a light pulse to the fiber using a light emit TIng diode (LED) or a laser beam, and the receiving device at the other end of the fiber detects the pulse using the light sensitive element.
Broadband is not strictly defined. From a general point of view, it is able to meet the bandwidth required by people to feel the various media transmission on the network, so it is also a dynamic, development concept.
It is a description of a continuation number or an electronic circuit that contains or is capable of processing a wide range of frequencies simultaneously. Broadband is a relative description. The larger the range of frequencies, that is, the higher the bandwidth, the more data that can be sent. For example, in radio communication, a narrow frequency range can only transmit Morse code, and a high bandwidth is required to transmit high quality music. The wideband representation of the TV antenna is capable of receiving a larger number of channels. In terms of data transmission, the same is the telephone line as the medium for signal transmission. The fiber optic cable is becoming more and more popular. The modem can only transmit 64Kbps of data per second. The broadband ADSL and fiber modem can provide higher transmission rate.
Broadband transmits electrical signals, and optical fibers transmit optical signals. This is the difference.
This refers to the way broadband is accessed. Broadband has multiple access methods to the client. The most commonly used are ADSL, vdsl, FTTB+LAN, and fiber access, as well as wireless access and power cat access. The access method is not directly related to the bandwidth of the application. That is to say, the application for 2M broadband can be achieved in any way, and the speed can reach 2M. It's just that the path is different. Just like going from a certain place to a certain place, you can walk by car, by car, by plane, by train. Because you are applying for 2M, you can reach your requirements in any way. If the network speed is increased to Gigabit in the future, then ADSL, VDSL, fttb+lan, and wireless will not meet the requirements. The fiber can meet the requirements. Only the device that needs to replace the two terminals replaces the 100-megabit device with 1000 megabytes. Yes.
Broadband refers to a network with high transmission speed. Optical fiber is the transmission medium, not the same concept.
It can be understood that fiber is one of the ways to achieve broadband transmission.
Today's broadband is basically divided into fiber access and ADSL access. ADSL currently has a maximum transmission capacity of only 10M.
Fiber and broadband are actually two different concepts
Optical fibers transmit signals in the form of optical pulses, using glass or plexiglass as the network transmission medium. It is a transmission medium, like twisted pair, thick cable, thin cable, etc., but his transmission speed is much faster than ordinary media, and can reach more than one megabit per second.
The broadband we are talking about is the speed of our Internet access. The speed of dial-up Internet has increased from 14.4Kbps to 56Kbps. However, due to the quality of the telephone line, 56Kbps should be the limit of the general modem. In order to get faster Internet access speeds, there is bound to be another sneak peek. Therefore, in recent years, various broadband access services have appeared. So what is broadband? In fact, there is no strict definition. Generally speaking, the upper limit of the current dial-up Internet rate is 56Kbps, and the access of 56Kbps and below is called "narrowband", and the access mode above is classified as "broadband".
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