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           Due to the many advantages of optical fiber communication technology, although the development of optical fiber communication technology is only 30 or 40 years, it has played a very profound role and promoted the revolution of human science and technology. 

           At present, optical fiber communication technology is widely used in many fields, not only in the communication industry, but also in the power industry, military field and so on. Optical fiber communication technology has the following applications in the communication industry: 3.1 wavelength division multiplexing technology. Wavelength division multiplexing technology is to divide the optical fiber low loss window into multiple transmission channels with different wavelengths. Through the wavelength division multiplexer, the optical signals are transmitted in different wavelength channels in the same optical fiber. When the signals reach the destination, they are separated by the wavelength division multiplexer. Just like dividing a road into multiple lanes, different cars drive in different lanes. Wavelength division multiplexing technology can greatly increase the transmission capacity of optical fiber. At present, wavelength division multiplexing technology has been widely used in long-distance network, metropolitan area network and so on. 3.2 optical fiber access technology. Optical fiber access refers to the broadband transmission technology that uses optical fiber as the main transmission medium to realize the "last station" of network information. According to the location where the optical fiber needs to be laid, the optical fiber access technology can be divided into optical fiber to roadside (fttn), optical fiber to building (ft-tb), optical fiber to office (FTTO), optical fiber to user (FTTH), etc. The final mode of optical fiber access technology is FTTH. Its function is to adopt all-optical access, that is, optical fiber transmission is adopted from the office end to the user's home, so as to meet the user's demand for infinite broadband

2022.01.08