Stage laser lights work by utilising the principles of stimulated emission and light amplification through the process of lasing. A laser system typically consists of a laser diode or gas-filled tube that emits coherent light. The emitted light is then focused and directed through mirrors and lenses to create a concentrated, intense beam. This beam is often split and passed through diffraction gratings or other optical elements to generate complex patterns and effects. These laser lights are controlled by software and can be synchronised with music or programmed to produce specific patterns, colours, and movements, adding dynamic visual elements to stage performances.