: Localized heating that changes the medium's refractive index.
(LIDGs) are temporary optical structures created when two or more coherent laser beams interfere within a material. Unlike permanent gratings etched into glass, these "transient" patterns exist only while the light is present, making them vital for real-time optical processing. How They Work Laser-Induced Dynamic Gratings
: Two laser beams intersect in a photosensitive medium (solid, liquid, or gas). : Localized heating that changes the medium's refractive
: Ionization in gases or solids to create high-density electron patterns. Laser-Induced Dynamic Gratings