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Idaho State University

Glossary

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Laser
  • Acronym for light amplification by stimulated emission of radiation. A device that produces an intense, coherent, directional beam of optical radiation by stimulating electronic, ionic, or molecular transitions to higher energy levels so that when they return to lower energy levels they emit energy. Note: Laser radiation may be highly coherent temporally, or spatially, or both. See also active laser medium, injection laser diode, optical cavity.