In addition you can export as DXF-file,wmf should work as well iirc.
The AI-Files that you produce with Illustrator are a standard format that most programs can open, at least the older versions.
You may want to review your graphics for coherence, though, especially to check the fonts that you used ! To make sure that anything that uses a font will be exported correctly you should convert your letterings to curves, making them independend of any fonts used. Otherwise you might end up with a replacement font in your graphics, since your certainly special fonts are either not available on your laser cutter´s or have not been embedded into your file. You are always better off with fonts converted to curves !!!