The laser, with its intense beam of focused pure light, precisely controlled and moved by computer, is being increasingly used for processing aircraft gas turbine engine components. Pratt & Whitney uses both solid state and gas lasers for a variety of applications including welding, cutting, hole drilling, hardfacing, and marking of parts for identification. Laser processing provides increased productivity and reduced cost compared to conventional methods. Specific uses of lasers in gas turbine fabrication are described and compared against the prior method of manufacture. Tooling approaches and metallurgical effects associated with various laser processes are also discussed.