Narrow-band acoustic attenuation measurements in vitreous silica at frequencies between 20 and 400 GHz

Acoustic attenuation rates in vitreous silica in the 20-400 GHz frequency range have been measured using a multiple-pulse optical technique for generation of tunable multicycle acoustic waves that are detected interferometrically after traversal of the sample. The results connect the frequency ranges of several measurement methods, yielding a consistent description of the acoustic behavior. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3595275]