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Acoustic pressure wave orientation determination using structured light.
Optics Express
|March 18, 2026
Summary
This study introduces a novel optical method to precisely measure acoustic wave direction. The technique uses structured light to map acoustic pressure-wave trajectories, advancing sensor technologies.
Area of Science:
- Physics
- Optics
- Acoustics
Background:
- Acoustic waves are vital in diverse fields, carrying valuable spatial and temporal information.
- Optical detection methods can measure acoustic-induced refractive index changes.
Purpose of the Study:
- To demonstrate a new approach for spatial and temporal acoustic measurements.
- To determine the two-dimensional directionality of acoustic pulses using structured light.
Main Methods:
- Utilizing a phase and amplitude structured probe beam.
- Measuring temporal power variance in a superposition of orbital angular momentum modes.
- Sequentially varying relative phase between modes to determine acoustic wave direction.
Main Results:
- Successfully demonstrated spatial and temporal measurement of acoustic pulse directionality.
- The method allows for two-dimensional mapping of acoustic wave trajectories relative to an optical axis.
Conclusions:
- The developed scheme offers a novel way to map acoustic pressure-wave trajectories.
- Bespoke structured fields can be utilized for advanced acoustic sensing and diagnostics.
