title: Principles of lasers.
abstract: The physics of lasers is described: a laser is light amplication by stimulation of emitted radiation. The laser beam is monochromatic, highly collimated, and delivers very high energy.
authors.affiliation: Department of Physics, Stanford University, California 94305-4060, USA.
authors.forename: A L
authors.initials: AL
authors.lastname: Schawlow
mesh_terms: D006801:Humans; D053685:Laser Therapy; D007834:Lasers