How Does Optical Fiber Transmit Signals? What is Optical Fiber Transmission?
How Does Optical Fiber Transmit Signals? What is Optical Fiber Transmission?
Blog Article
Now no one doesn’t know the Internet, but if you ask what it is, few people will answer it well. It well known that it can do a lot of things online. And many super companies have emerged based on the Internet. This is our impression of the Internet. Is the Internet really like a mobile phone signal that we can’t see or touch? What is optical fiber transmission?
In fact, in addition to the base stations we know, there are optical cables for long-distance transmission. The submarine cables connecting the continents currently have more than 380 submarine cables in the world, responsible for 95% of the data transmission between the continents. Watching a foreign football game, TV programs, making overseas calls, and using the Internet are all transmitted through submarine cables.
Optical cables communication cables composed of two or more glass, plastic optical fiber cores and a sheath. The internal signal transmission of optical fibers generally uses lasers. Which have the characteristics of high speed, large capacity, and long-distance transmission.
The data transmission rate of a single optical fiber can reach several Gbps, the transmission of submarine cables reaches an astonishing 160 TBps, and the transmission distance can reach tens of kilometers without the use of signal amplifiers. (1G = 1024M 1T = 1024G)
History of Optical Fiber Development
In ancient times, there was no Internet or optical cables. And people used flying pigeons to quickly transmit information. With the rapid development of science and technology, mankind has entered the information age. As the amount of information increases, it is necessary to find a new method of transmission. After years of research, the transmission speed is faster, the transmission volume is larger, and the loss is higher. Optical fiber communication was born, and mankind entered the age of light.
In 1870, British physicists discovered the principle of total reflection of light, laying the foundation for future optical fiber transmission signals.
In 1880, the invention of “optical telephone” used light beams to transmit sound waves.
And in 1970, Corning developed a quartz glass fiber with less attenuation.
In 1980, the first optical fiber cable began commercial use.
In 1988, the transatlantic submarine cable connecting Britain. The United States and the United States successfully laid.
In 1978, China developed its own communication optical fiber. Then has optical fiber transmission.
In 2005, ultra-large capacity optical fiber communication opened from Shanghai to Hangzhou.
How does optical fiber work?
First, the information to transmitted. Such as voice will converted into an electrical signal at the transmission end. Then it transmitted to the laser beam by laser. The intensity of light varies with the frequency of the electrical signal and transmitted through the optical fiber. At the receiving end, the detector receives the optical signal and converts it into an electrical signal. After processing, the original information restored.
The optical fiber made of glass fiber inside the optical fiber can transmit optical signals to thousands of kilometers. And hundreds of thousands of optical fibers combined into one cable with the same cable. This improves the strength of the optical fiber. And greatly improves the communication capacity.
The propagation speed of light in different materials is different. Therefore, when one substance is shot at another substance. The intersection of the two substances will refracted and reflected. And the angle of the refracted light will change with the angle of the incident light. However, when the angle of the incident light reaches or exceeds an angle, the refracted light disappears. The incident light will reflected back. This is the total reflection of light.
The optical signal transmitted to the endpoint after repeated refracting in the optical fiber. Optical fiber transmission signal. Optical signal dispersed or attenuated after one refraction. The optical signal needs to be amplified once every 50 kilometers. Report this page