Abstract
The nonlinear pressure profile at the focus of an ultrasonic beam radiated into water at a frequency of 2.0 MHz and having a shock front with amplitude of 50 MPa is reconstructed for the first time using Raman lidar signals. This is possible due to the relationship between the degree of deformation of the O–H stretching vibration band in the Raman spectrum of water, the amplitude of elastic scattering, and the pressure at the sounding site. The lidar profile is in good agreement with a PVDF hydrophone profile.
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ACKNOWLEDGMENTS
We thank L.M. Krutyanskii, Cand. Sci. (Engineering), for his technical assistance and helpful advice.
Funding
This work was supported in part by the Russian Science Foundation, project no. 19-19-00712.
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Translated by I. Obrezanova
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Pershin, S.M., Brysev, A.P., Grishin, M.Y. et al. Reconstructing the Nonlinear Pressure Profile of an Ultrasonic Beam in Water Using Raman Lidar Signals. Bull. Russ. Acad. Sci. Phys. 85, 665–669 (2021). https://doi.org/10.3103/S1062873821060174
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DOI: https://doi.org/10.3103/S1062873821060174