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Lasers as an energy source

  1. Oct 4, 2013 #1
    if lasers produce so much power why can't we use it as an energy source
     
  2. jcsd
  3. Oct 4, 2013 #2
    Well to get a laser beam you have to supply energy right? If laser is used as an energy source you are getting nothing but the same energy you had supplied, practically lesser perhaps...
     
  4. Oct 4, 2013 #3
    Here are schematics of three laser devices; red laser pointer, green laser pointer and a Helium–neon laser. Where are the energy sources (power supplies) in the pictures?

    green-laser-compare.jpg

    Helium–neon laser:
    http://www.olympusconfocal.com/java/henelasers/henelasersfigure1.jpg [Broken]
     
    Last edited by a moderator: May 6, 2017
  5. Oct 4, 2013 #4
    some can produce terawatts of power so where do they get all that energy to feed into the laser
     
  6. Oct 4, 2013 #5

    DrClaude

    User Avatar

    Staff: Mentor

    Power is not energy. Terawatt lasers produce very short pulses.

    As others have pointed out, lasers are not a source of energy. The consume more energy than what comes out in the form of light.
     
  7. Oct 4, 2013 #6
    Last edited: Oct 4, 2013
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