The current transmission distance of optical communications
Is the use of infrared (wavelength 300 ~ 0.76 microns) transmission of information communication mode. It can transmit language, text, data, images and so on. It is suitable for remote control along the island, close distance, and communication inside the aircraft. The utility model has the advantages of large communication capacity, strong confidentiality, good electromagnetic interference resistance, simple equipment structure, small size, light weight and low price. But in the atmospheric channel transmission is easily affected by the climate, the transmission distance is 4000 meters.
Optical communications devices are only suitable for distances from the last few kilometers.Optical communication is the communication of light wave as carrier. There are two ways to increase the bandwidth of optical channel. One is to increase the single channel transmission rate of optical fiber; the other is to increase the number of wavelengths transmitted in a single fiber, (wavelength division multiplexing) (WDM).
One of the classifications of optical communications is infrared communication: the transmission distance is thousands of meters.
