MadSci Network: Physics |
A HeNe (Helium Neon) laser is probably the easiest to make, not least because you can buy kits to put them together fairly cheaply, including everything you need.
Try this link: Information Unlimited for a sample HeNe kit.
Also, look at Sam's Laser FAQ for a more comprehensive list of suppliers, data, hints, etc.
-Greg Billock
Try the links in the MadSci Library for more information on Physics.