Acousto-optic visualization of optical wavefronts [Invited].

Area of Science:

• Optics and Photonics
• Acousto-Optics
• Wavefront Sensing

Background:

• Optical wavefront visualization is crucial for understanding light propagation.
• Existing methods may struggle with amplitude-modulated optical fields.
• Acousto-optic (AO) methods offer a potential alternative for phase visualization.

Purpose of the Study:

• To survey theoretical and experimental investigations of an acousto-optic (AO) method for optical wavefront visualization.
• To detail the principles and capabilities of AO wavefront visualization.
• To highlight the advantages of AO methods for phase object visualization.

Main Methods:

• The AO method utilizes the angular selectivity of Bragg diffraction.
• Light intensity distribution in the visualized image is proportional to the phase gradient.
• Computer simulations and experimental results are used to illustrate the method's potential.

Main Results:

• The AO method enables visualization of optical wavefronts based on phase gradients.
• Spatial resolution and contrast are primarily influenced by the acoustic beam's divergence angle.
• The method successfully visualizes two-dimensional phase objects, even with amplitude modulation.

Conclusions:

• The AO method is a promising technique for optical wavefront visualization.
• Its ability to register phase structure in the presence of amplitude modulation is a key advantage.
• The AO method offers a valuable tool for studying phase objects in optics.