FYI here's a example of cutting with the laser. I want to test for cutting some very small pieces for a special inlay. The material is 1.5mm Birch the I created on my drum sander.
The left example (the black blob) is set at 1 in/min, the others are 2, 4, and 8. The '1' actually did not cut through the material!! Burn, smoke ? The '2' cut out nicely and didn't burn too far through the material. It popped out nicely with minimally burned edges. The '4' and '8' only cut through in spots. This is one of my standard test examples. The focus is from the bottom edge of the shield using a 1/8" bit.
I'm working on project where I need very small, accurate inlays with very thin wood (1mm). Cutting this, even with a very small bit, leaves a lot of chipped and splintered parts. That's OK, I usually make enough to throw away the imperfect ones. This cuts down on the problems. A quick clean with DNA. and they look great.