Fiber optic cable communication is the main transmission method of modern communication transmission system. The development history of fiber optic cable is only one or two decades. It has undergone three upgrades: short-wavelength multimode fiber optic cable, long-wavelength multimode fiber optic cable and long-wavelength single-mode fiber optic cable. . The use of fiber optic cable communication is a major change in the communication transmission system. At present, China’s fiber optic cable communication has entered a practical stage. In addition, many countries have announced that they will no longer build cable communication lines and are committed to the development of fiber optic cable communication.
Fiber optic cable communication overview: The use of fiber optic cable to transmit light waves carrying information to achieve the purpose of communication transmission. In order to make a light wave a carrier carrying information, it must be modulated, and the information is detected from the light wave at the receiving end. Fiber optic cable communication transmission as a technology, its development history is only 30 to 40 years, but it has completely changed the face of world communication transmission, the future development is immeasurable
The principle of fiber optic cable communication transmission: firstly, the transmitted information (such as voice) is first converted into an electrical signal at the transmitting end, and then modulated onto the laser beam emitted by the laser, so that the intensity of the light changes with the amplitude (frequency) of the electrical signal. And transmitting through the fiber optic cable; at the receiving end, the detector receives the optical signal and converts it into an electrical signal, and after demodulation, restores the original information.
Advantages of fiber optic cable transmission: large communication capacity, long transmission distance; low loss of fiber optic cable; small signal interference, good security; anti-electromagnetic interference, good transmission quality; small size and light weight of fiber optic cable, easy to lay and transport; Rich in materials and environmental protection, it is conducive to saving non-ferrous metal copper; no radiation, difficult to eavesdrop; optical cable adaptability and long life. Disadvantages of fiber optic cable transmission: poor texture and poor mechanical strength;) The cutting and connection of fiber optic cable requires certain tools, equipment and technology; the branching and coupling are not flexible; the bending radius of the fiber optic cable cannot be too small (>20cm); Power supply problems.
Development prospects of fiber optic cable communication: From the above advantages and disadvantages analysis, a little more than the shortcomings, while some shortcomings can be avoided in the implementation process, so in general, the use of fiber optic cable to achieve communication transmission is a major advancement in communication transmission, but in reality China The annual sales volume of fiber optic cable communication equipment and optical cable keeps rising, which also proves that the development prospect of the fiber optic cable communication market is very broad.