Schematic diagram of optical fiber communication

1, the principle of optical fiber communication is: at the transmitter, the transmitted information (such as voice) should be converted into electrical signals, and then modulated onto the laser beam emitted by the laser, so that the intensity of light changes with the amplitude (frequency) of the electrical signals, and then transmitted through optical fiber; At the receiving end, the detector converts the optical signal into an electrical signal after receiving it, and recovers the original information after demodulation.

2. With the increasing update of information technology transmission speed, optical fiber technology has been widely valued and applied. In the multi-microcomputer elevator system, the application of optical fiber fully meets the requirements of correct, reliable and high-speed transmission and processing of a large number of data communication. The application of optical fiber technology in elevator greatly improves the response speed of the whole control system and the parallel group control performance of elevator system. The optical fiber communication device used in elevator is mainly composed of light source, photoelectric receiver and optical fiber.