Lasers as an energy source

if lasers produce so much power why can't we use it as an energy source

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...

DennisN
Gold Member
if lasers produce so much power why can't we use it as an energy source

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?

Helium–neon laser:
http://www.olympusconfocal.com/java/henelasers/henelasersfigure1.jpg [Broken]

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some can produce terawatts of power so where do they get all that energy to feed into the laser

DrClaude
Mentor
some can produce terawatts of power so where do they get all that energy to feed into the laser
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.

DennisN
Gold Member
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