Development Overview of fiber optic cable
Feb 23, 2023| Development Overview of fiber optic cable
Optical fiber communication is one of the important ways of modern information transmission. It has the advantages of large capacity, long relay distance, good confidentiality, no electromagnetic interference, and copper saving.
In the construction of 3G network and the implementation of FTTH (fiber-to-the-home), the development momentum of China's optical fiber and cable industry is good. my country has become the world's most important optical fiber and cable market and the world's largest manufacturer of optical fiber and cable, and has made remarkable achievements.
Fiberglass has been used to transmit light for more than 30 years. The initial application of optical fiber was limited to certain optical machinery and medical equipment (such as light guidance and gastroscope, etc.), which transmitted visible light with an attenuation of up to 1000 decibels/km. In 1966, Kao first proposed the idea of using quartz-based glass fibers for long-distance optical information transmission. In 1970, a high-purity silica optical fiber was made by chemical vapor deposition in the United States, and its attenuation was reduced to 20 decibels/km, thus making long-distance transmission a reality. Afterwards, the attenuation of optical fiber decreased rapidly, and by the late 1970s it had dropped to the theoretical limit level of 0.2 decibels/km. The bandwidth of optical fiber is continuously increasing, and single-mode optical fiber with a bandwidth of hundreds of gigahertz kilometers has been available for practical use in the early 1980s. A fiber optic communication system with a relay distance of over 100 kilometers and a capacity of hundreds of megabits per second has been developed. Optical fiber communication equipment manufacturing has developed into a new industrial sector. The characteristics that the intensity and phase of light waves in optical fibers change with changes in physical quantities such as temperature, electric field, and magnetic field have been used in high-sensitivity telemetry sensors.
The birth and development of optical fiber communication is an important revolution in the history of telecommunications. Optical fiber communication is developing towards high-speed, ultra-high-speed, ultra-large-capacity optical fiber transmission and all-optical networks.
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