In daily life, optical fiber is used for long-distance information transmission because the transmission loss of light in optical fiber is much lower than that of electricity in wires.
Usually, the terms optical fiber and optical cable are easily confused. Most optical fibers must be covered by several protective structures before use, and the covered cables are called optical cables. The protective layer and insulating layer on the outer layer of optical fiber can prevent the surrounding environment from damaging the optical fiber, such as water, fire and electric shock.
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Description: 9/ 125μm means that the core and cladding of optical fiber are 9μm, 9/125μm is an important characteristic of single-mode optical fiber, and 50/ 125μm means that the core and cladding of optical fiber are 50μm and 125μm.
Among them, the BRICS optical cable project is a submarine optical cable project directly connecting five BRICS countries, which will be started in early 20 14 and put into use in mid-20 15. The total length of the project is 34,000 kilometers, of which the submarine optical cable directly connecting the BRICS countries is about 24,000 kilometers.
In 20 13 years, the global 100G optical fiber revenue is expected to break through 10 billion USD for the first time. The company analyzed the financial performance of the global optical network market in the first quarter of 20 13, and found some trends, including a disappointing trend, that is, the overall growth of the market is still difficult, and only the profit of Fuji Company in Japan has increased year by year.