What is stimulated Brillouin scattering?
Stimulated Brillouin scattering (SBS) involves scattering from high-frequency sound waves. The gain for SBS is usually greatest in the backward direction and is observed most commonly in this geometry, as shown in Fig. 26a. The equations describing backward SBS are. FIGURE 26.
What is scattering in optical fiber?
Basically, scattering losses are caused by the interaction of light with density fluctuations within a fiber. Density changes are produced when optical fibers are manufactured. During manufacturing, regions of higher and lower molecular density areas, relative to the average density of the fiber, are created.
What is SBS suppression?
Abstract. Stimulated Brillouin scattering (SBS) is typically the lowest order nonlinearity encountered in ytterbium doped fiber amplifiers (YDFA), and the simplest means of suppressing it is though linewidth broadening from phase modulation.
How does Brillouin scattering work?
Brillouin scattering is the inelastic scattering of light (photons) by thermally generated acoustic vibrations (phonons). That is, incident light is scattered from acoustic vibrations that result from thermal motion of atoms in a material.
What do you mean by stimulated Raman scattering?
Stimulated Raman scattering is a nonlinear effect in which energy is coupled from an optical pump beam to longer wavelengths via vibrational modes or thermal phonons of the molecules in the glass medium.
What is Brillouin Scattering used for?
Thus, Brillouin scattering can be used to measure the energies, wavelengths and frequencies of various atomic chain oscillation types (‘quasiparticles’). To measure a Brillouin shift a commonly employed device called the Brillouin spectrometer is used, the design of which is derived from a Fabry–Pérot interferometer.
What is scattering types of scattering?
There are three different types of scattering: Rayleigh scattering, Mie scattering, and non-selective scattering. Rayleigh scattering mainly consists of scattering from atmospheric gases. This occurs when the particles causing the scattering are smaller in size than the wavelengths of radiation in contact with them.