A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation". The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light coherently. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single color of light. Temporal coherence can be used to produce pulses of light as short as a femtosecond.
Among their many applications, lasers are used in optical disk drives, laser printers, and barcode scanners; fiber-optic and free-space optical communication; laser surgery and skin treatments; cutting and welding materials; military and law enforcement devices for marking targets and measuring range and speed; and laser lighting displays in entertainment.

View More On

    Recent Content Tagged With laser

  1. BenjaminTrif79
  2. Blondeziegbart
  3. RaceFan
  4. sgtmike
  5. Denwhit
    Thread by: Denwhit, May 19, 2019, 1 replies, in forum: Scope & Optic Classifieds
  6. Mightysloth
  7. KenD
  8. Cow3oy wayne
  9. RaceFan
  10. bow503
  11. 808hondacrguy
  12. DRH
  13. Newberg
  14. Migs714
  15. dlux503
  16. kmk1012
  17. hondakilla98
  18. MannyGlocks
  19. DD44Dostovei
  20. Not BATFE