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Schlieren-style stroboscopic nonscan imaging of the field-amplitudes of acoustic whispering gallery modes
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- Authors
- Issue Date
- 2020-09-20
- Publisher
- Optical Society of America
- Citation
- Applied Optics, Vol.59 No.27, pp.8228-8234
- Abstract
- We report a schlieren-style stroboscopic phase-contrast field-amplitude imaging of two-dimensional acoustic whispering gallery modes in a circular shell cavity immersed in liquid. A schlieren signal is combined with a presplit reference beam to enable nonscan field-amplitude imaging. Excitation mechanisms of standing and traveling eigenmodes, respectively, are analyzed with acoustic ray simulations presented in a Poincare surface of sections. The time evolutions for both standing and traveling eigenmodes are reconstructed using the stroboscopic capability. (C) 2020 Optical Society of America
- ISSN
- 1559-128X
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