Researchers at the Max Planck Institute for Photonics in Erlangen discovered a new mechanism for light guiding in photonic crystal fiber (PCF). Photonic crystal fiber is a hair-like glass fiber, the structure of the center along its length along the regular arrangement of hollow channels. When this optical fiber is helically twisted, the helical array of hollow channels act on the light in a manner similar to what is described by general relativity, where light travels in the space due to attractive forces as it travels through the stars. Optical fiber as a light pipe. Just as the inside of a pipe is surrounded by walls, the fiber usually has a light-guiding core whose glass fiber has a higher index of refraction than the glass of the closed overlay. The difference in refractive index causes the light to reflect at the cladding interface and trap in the tubular core. A team led by Philip Russell (director of the Max Planck Institute of Light) led the first light-guide for coreless photonic crystal fibers. Photonic crystals have a butterfly-like color that guides light A typical photonic crystal consists of a piece of glass with regularly arranged holes in its volume. Since glass and air have different refractive indices, the refractive index has a periodic structure. This is why these substances are called crystals whose atoms form ordered three-dimensional lattices in crystalline salts or silicon, for example. In conventional crystals, such as in insulators, conductors and semiconductors, the precise design of the three-dimensional structure determines the behavior of the electrons. In a similar way, the optical properties of a photonic crystal depend on the periodic three-dimensional structure, which in some butterfly wings determines the glittering color of the butterfly. Being able to control the optical properties of a material is very useful in a wide variety of applications. Photonic crystal fibers developed by Philip Russell and his team at the Max Planck Institute in Erlangen can be used to filter the visible spectrum at specific wavelengths or to produce ultra-white light. As with all optical fibers used in telecom, all conventional photonic crystal fibers have a core and cladding having different refractive index or optical properties. At PCF, air-filled channels give the glass a different index of refraction than full solid glass. Aluminum Tube,Aluminum Tubes,Toothpaste Tube,Hand Cream Tube Jiangsu Hanmo Tecchnology Ltd,.Co , https://www.jshanmotecho.com