Stimulated Brillouin scattering in fiber-optic waveguides

An experimental investigation was made of stimulated Brillouin scattering (STBS) in multimode quartz fiberoptic waveguides excited by a relatively narrow-band (spectral band width of less than 0.025 cm^–1) spatially inhomogeneous pump source. Mathematical expressions are given which characterize the development of steady-state STBS and help to explain certain properties of observed STBS. A description is given of the characteristic features manifested by STBS excited together with stimulated Raman scattering, and also of new facts associated with damage to the fiber-optic waveguides.