Actually, blender 3d is probably not the best tool for a laser. You can make it work but way overkill for a laser and a lot baggage with the software. It can export svg, fbx though so it will work and its free.
I did/do all my work for my laser on CorelDraw. You really want a 2d vector or raster program depending on what you are wanting to do.
3d software for 2.5/3d bas-relief carvings, 2d vector software for laser vector cutting/graphics, 2d raster software for laser engraving pics.
I have a cheapo Chinese 40W (not really) laser with an upgraded digital controller.
Would love to hear other folks thoughts.