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Development of optical fiber communication

Development of

Optical fiber communication is the main transmission means of modern communication networks. Its development history is only one or two decades. It has experienced
three generations: short-wavelength multimode fiber, long-wavelength multimode fiber, and long-wavelength single-mode fiber. The use of optical fiber communication is a
major change in the history of communications. More than 20 countries such as the United States, Japan, Britain, and France have announced that they will no longer build
cable communication lines, and are committed to the development of fiber-optic communications. China’s optical fiber communication has entered a practical stage.
The birth and development of optical fiber communications are telecommunications an important revolution in the history of satellite communications, mobile
communications tied to the technology of the 1990s. After entering the 21st century, due to the rapid development of Internet services and the growth of audio, video, data,
and multimedia applications, there is a more pressing need for high-capacity (ultra-high-speed and ultra-long-haul) optical wave transmission systems and networks.
Optical fiber communication is a new communication technology that uses optical waves as a carrier to transmit information and optical fiber as a transmission medium to
achieve information transmission.
The development process of communication is to continuously increase the carrier frequency to expand the communication capacity. The optical frequency as the carrier
the frequency has reached the upper limit of the communication carrier. Because light is an electromagnetic wave with extremely high frequency, the communication capacity
is very large with light as a carrier. It is a thousand times of communication methods in the past, and it has great attraction. Optical communication is the goal that people
have long pursued, and it is also the inevitable direction of communication development.
Compared with the previous electrical communication, the main difference of optical fiber communication is that it has many advantages: it has a wide transmission
bandwidth and large communication capacity; low transmission loss and long relay distance; fine wire diameter and lightweight; the raw material is quartz, saving metal
materials. Conducive to the rational use of resources; strong insulation and anti-electromagnetic interference; also has the advantages of strong anti-corrosion ability, strong
radiation resistance, good routable, no electric spark, small leakage, strong confidentiality, etc., can be used in a special environment or military Used on.
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