Strengths and weaknesses
(1) The communication capacity is large and the transmission distance is long; the potential bandwidth of an optical fiber can reach 20THz. With such a bandwidth, it takes
only one second or so to transfer all the texts of human beings from all over the world. The 400Gbit/s system has been put into commercial use. The loss of the fiber is
extremely low. At a wavelength of about 1.55 μm, the loss of the quartz fiber can be less than 0.2 dB/km, which is lower than the loss of any transmission medium. Therefore,
the non-relay transmission distance can reach tens or even hundreds of kilometers.
(2) The signal interference is small and the security performance is good;
(3) Anti-electromagnetic interference and good transmission quality, electrical communication cannot solve various electromagnetic interference problems, only optical fiber
communication is not subject to various electromagnetic interference.
(4) The fiber is small in size and light in weight, which is easy to lay and transport;
(5) Rich sources of materials and good environmental protection are conducive to the conservation of non-ferrous metal copper.
(6) No radiation, it is difficult to eavesdrop, because the light wave transmitted by the fiber cannot run out of the fiber.
(7) The optical cable has strong adaptability and long service life.
(8) The texture is brittle and the mechanical strength is poor.
(9) Cutting and joining of optical fibers requires certain tools, equipment and techniques.
(10) The branching and coupling are not flexible.
(11) The bending radius of the fiber optic cable should not be too small (>20cm)
(12) There is a problem of power supply difficulties.
A communication method that uses light waves to transmit information in optical fibers. Because laser has high directionality, high coherence, high monochromaticity and
other significant advantages, the optical wave in optical fiber communication is mainly laser, so it is also called laser-fiber communication.
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