This looks very much like cinema 4d.
There are probably several ways you can do this regardless of program.
One would be having a strong spotlight with a drop off or some sort of limit, one would be applying glow to a cylinder (which it looks like you have been doing), probably possible with particle effects as well.
If you just make the cylinder transparent and keep the glow it probably would work.
One way to do it if you are just planning on rendering an image would be to just edit in the lazer in photoshop.
important to remember to turn off cast shadows so you don't see the cylinder on the ground.
Be more precise.
Last edited by Ezeth; Dec 8, 2012 at 07:20 PM.