- I want to remove a coating on a KTP crystal that filters 1064nm light for a makeshift optical parametric amplifier.
I want to make an optical parametric amplifier and am considering using a KTP crystal from a laser pointer. The problem is the KTP seems to have a coating that filters 1064nm light which I want the OPA to produce. I've tried to remove the coating using nail polish remover (acetone), but that didn't seem to work. Do you have any advice? I'm thinking I may try to cut the crystal with the coating off with a small blade, but I'm concerned that may have negative effects on the experiment: I want to generate position-momentum entangled light, and I'm a little concerned cutting it at an angle might influence that; although I may be worried about nothing.