High-power laser technology is a field of research and engineering focused on the generation, manipulation, and application of laser beams delivering extremely high energy or peak power, significantly exceeding typical industrial or scientific laser levels. It investigates the fundamental interaction of intense electromagnetic radiation with matter, enabling the creation and study of extreme states of matter, such as high-energy-density plasmas, and facilitating research into areas including inertial confinement fusion, particle acceleration, advanced material processing, and fundamental physics under conditions mimicking astrophysical environments.