Acousto-optics

Acousto-optics involves using sound waves (ultrasound) to control and manipulate light waves within a material. When ultrasound travels through a medium, it creates tiny variations in density and refractive index, acting like a dynamic lens or diffraction grating. This allows precise modulation, steering, or filtering of laser beams without physical contact. Acousto-optic devices are used in applications like laser tuning, modulation, and switching, enabling fast, accurate control of light signals in telecommunications, scientific research, and optical systems.