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Intrinsic Brillouin linewidths and stimulated Brillouin gain coefficients in glasses studied by inelastic light scattering

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Abstract

Rayleigh–Brillouin scattering measurements on various multicomponent halide glasses and some selected oxide glasses were performed. The Brillouin linewidth measurements, the Brillouin intensities, and Brillouin frequency shifts allowed us to calculate the phonon attenuation, Pockels elasto-optic coefficients, and the stimulated Brillouin scattering gain coefficients. Brillouin linewidths obtained experimentally range between the limit of 21 MHz for an 88BeF2–12ThF4 glass and 213 MHz for a zirconium barium lanthanum fluoride glass. The parameter obtained in this study shows that the threshold power for the onset of stimulated Brillouin scattering in some halide glasses is greater than that for silicate glasses, which has important ramifications as a selection criterion for halide-based glasses as single-mode optical waveguide materials.

© 1989 Optical Society of America

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