Optical technology

Optical transmission technology which made its appearance in 70 years, spread over a
ten years in the networks represented in the form of optical fibers. In 2004, 55million km of fiber have been made by operators in the world, and this phenomenon continues each year. That is why there is an increased supply fiber Optical black at the expense of leased lines in most part of Europe. Optical technologies haveemerged through their capacity to carry data at high speed, their flexibility allocation of resources and the simplicity of their interfaces by over SDH technology (Synchronous Digital Hierarchy).






A dedicated fiber optic communications for long distance is a "bar" very fine (125 m) glass extremely pure, which gives the property to behave as a guide light on several hundreds of kilometers. Fiber, wrapped in a layer of plastic, is consisting of a core and a sheath of glass, of clues different environment. A phenomenon
total internal reflection allows the light to spread along the core of the fiber.