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is it possible to make a laser beam more powerful by adding more lasers?

iv been looking at the laser cutter 'ables and am wondering it its possible to combine say 10 fairly high powered (cheap/er) lasers into a single beam to create a more powerful burn. id prefer not to go out and buy $2000 worth of laser which ill most likely break. or get arrested for trying to bring through customs. i was thinking of using a diverging lens to make the spread out rays in a parallel path. in diagram i understand that mounting the lasers will be a challenge.. but will constructive/deconstructive interference be a problem.. i didnt listen to well in physics. any ideas would be appreciated grim out.

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dpsilver4 years ago
well im not sure but i think all the lasers u have, has to be the same wavelength and in phase with each other
instead or using the lens u could just focus all the lasers on ur target i think 
You can use different Beams by using an RGB Beam Combiner, Which you can see here if interested. ( http://www.cnilaser.com/combiner.htm) hope this may help someone. Cause I to would like to set up multiple Beams into one Powerhouse for cutting. And most of all to set up a vary large capacitor bank to fire off One Big Hot Shot at a time like a Laser Canon. If anyone has any knowledge for implementing a Laser Canon. It would be appreciated.
oangelo4 years ago
You should use lasers of different wave lengths(colors)!
see:
http://www.optoiq.com/index/photonics-technologies-applications/lfw-display/lfw-article-display/332972/articles/laser-focus-world/volume-44/issue-7/features/photonic-frontiers-beam-combining-combining-beams-can-boost-total-power.html
krujh24 years ago
Yes, a concave lens (like the one in the diagram)would focus the lasers into a single point and, as long as the lasers you have are burning ones, it would increase the burn rate. In other words, say your lasers power variable is L. Now, if you take 5 lasers, 5 L, the equation would equal to 5 times the power of 1 Laser, or 1 L, shown here:

L=1
P=5 (power)

Lx5=5 L=L+L+L+L+L=P

Funny enough, I was actually thinking of doing the same thing. That's how I found this question. Hope everything I've said helps you!

-krujh2
Pinworthy5 years ago
Try a concave mirror like the telescopes use.  That would combine your beams but i am not sure if it would do any cutting as you only have a focus point and not a focused beam.

Steve D
Steamdnt5 years ago
It seems like a possibility, however it would likely be incredibly difficult to align the lasers and lens in to a usable beam... Instead of lasers how about a death ray, thing converging lens and sunlight, using a large fresnel lens from a big old TV to make it is relatively simple and would give you a powerful beam, also when focused right it'd be small...
Not that small a focal point. Steve