[billblack]

Originally Posted by cosmo2 Does anybody know how I can combine two laser beams? I have two 60watt co2 tubes and I want to combine their beams in order to get at least 100watts. thank you.

Laser light is what it is because the light waves are coherent. Combining two coherent light sources in a manner that maintains that coherence will probably be more expensive than buying a 100 watt tube, but it sounds like a very interesting project. A couple of places to look:http://www.rp-photonics.com/beam_combining.html and http://www.physicsforums.com/archive...p/t-62148.htmlIf that doesn't get you started, try posting athttp://www.physicsforums.com/index.php. If you get it done, please post. It would be of interest to me.
Good luck!