Optical fiber can transmit digital signals as well as analog signals. Optical fiber is widely used in communication networks, radio and television networks and computer networks, as well as in other data transmission systems. Fiber optic broadband backbone transmission networks and access networks are developing rapidly and are the main target of current research and development applications.
The various applications of fiber optic communication can be summarized as follows:
① communication networks
②computer local area networks and wide area networks that constitute the Internet
③ Cable TV network backbone and distribution network
④Integrated service fiber optic access network
First and second level telecommunication backbone of municipal cities, telecommunication LANs of banks, troops, post offices, railroads, etc
