terminal is coupled to the optical detector to transmit

information, to complete the task.

( 4) repeater

Repeaters by the light detector, light source and decision regeneration circuit. Its role has two: one is the compensation optical signal in the optical fiber transmission by attenuation; another is on the pulse waveform distortion in administrative. ( 5) fiber optic connectors, couplers and passive devices Because the optical fiber or cable length by optical fiber

drawing process and optical cable construction condition, and the fiber drawing length is limited ( such as 1Km ). Therefore, a fiber optic line may exist a plurality of optical fiber connection problems. Then, the connection between the optical fiber and optical fiber, optical coupling and coupling of optical fiber connectors, couplers, and passive devices use is essential. Four. The future development trends of optical fiber

communication

At present, in the field of optical communication technology development of hot ultra high speed transmission system, large