Photonics Dictionary

stimulated Brillouin scattering

In Stimulated Brillouin Scattering (SBS), an incident photon (usually laser light) interacts with acoustic phonons in a medium. The energy and momentum of the incident photon are transferred to the acoustic phonons, resulting in the creation of a scattered photon with a slightly different frequency (Stokes shift). Another scattered photon, called the anti-Stokes photon, can also be generated with a frequency higher than that of the incident photon.

SBS is particularly important in the field of optics and fiber optics, where it can be both a useful effect and a limiting factor in optical communication systems.
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