Bragg Scattering is a phenomenon used to control the transmission of light through optical fiber cables. It is based on the principle of diffraction, which is the bending of waves around an obstacle. In this context, the obstacle is a change in the refractive index of the fiber. When light passes through the fiber, it is scattered and reflected back in the opposite direction by the change in the refractive index. This reflection creates a series of narrow bands, or ‘Bragg peaks’, on the spectrum of the light.
In optical fiber cables, Bragg scattering is used to control the transmission of light. By creating periodic changes in the refractive index along the length of the fiber, it is possible to create a series of narrow bands, or ‘Bragg peaks’, on the spectrum of the light that is traveling through the cable. These peaks act as a form of filter, allowing only certain wavelengths of light to be transmitted. The result is that the cable is able to transmit light of a specific wavelength while blocking out other wavelengths.
Bragg scattering is used in many different types of optical fiber cables. It is used in Fiber Bragg Gratings (FBGs), which are used for a variety of applications such as wavelength division multiplexing (WDM) and optical communications. It is also used in Distributed Bragg Reflectors (DBRs), which are used to control the transmission of light in optical switching networks.
Bragg scattering is an important part of modern optical communications. By controlling the transmission of light through optical fiber cables, it is possible to create highly efficient and reliable networks with low levels of signal loss.