Technical Terms and Definitions

Fiber Optics - Telecommunications

A technology in which light is used to transport information from one point to another. More specifically, fiber optics are thin filaments of glass through which light beams are transmitted over long distances carrying enormous amounts of data. A thin silica glass cable (appx 125 micrometers in (diameter) with an outer cladding material around 9 micrometers diameter inner core with a slightly higher index of refraction than the the cladding. Optical fiber is made of glass or plastic, and guides light, whether or not it is used to transmit signals. Optical fiber is an almost ideal transmission medium. It has the following advantages:

  • Transmission losses are very small.
  • The bandwidth is greater than any other transmission medium we know of today. Furthermore, we have no idea what the theoretical BW of a strand of fiber might be.
  • Fiber is immune to electromagnetic interference.
  • Fiber does not radiate.
  • You can put many strands of fiber carying much information in the same bundle and they won't interfere with each other (no cross-talk between the adjacent fibers).