The guided acoustic-wave Brillouin scattering (GAWBS) technique is applied to acoustic velocity estimation for single-mode fibers. The GAWBS measurement can be carried out with a simple experimental setup. This technique is used to measure the fluorine (F) concentration dependence of the shear wave velocity. As a result, it is clarified that the sound velocity of the shear wave decreases as F concentration increases. Moreover, the shear wave velocities obtained with this method are in good agreement with the values obtained for bulk glass by elastic property measurements.>
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Shiraki et al. (1992) studied this question.
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