waveguide devices
For waveguides for electromagnetic wave propagation at microwave and radio wave frequencies, see Waveguide (electromagnetism). For other types of waveguide, see Waveguide. An optical waveguide is a physical structure that guides electromagnetic waves in the optical spectrum. Common types of optical waveguides include optical fiber and rectangular waveguides. Optical waveguides are used as components in integrated optical circuits or as the transmission medium in local and long haul optical communication systems.