Results on the measurement of flexural and longitudinal acoustic waves propagating in an optical fibre are presented. Using the extrinsic Fabry-Perot interferometric technique, parameters such as the acoustical wavelength and the acoustical phase velocity can be assessed.
Da Silva, R. E., & De Almeida Prado Pohl, A. (2012). Characterization of flexural and longitudinal acoustic waves in standard and photonic crystal fibres. In International Conference on Transparent Optical Networks IEEE. https://doi.org/10.1109/ICTON.2012.6253895