I have a suggestion for the illustration. It looks like the object on the left is something between two mirrors and the two mirrors are movable in and out. I assume, but I may be wrong, that it is a resonator??? I think if it is just a laser, remove the two mirrors and the double arrow. If it is something else I am misinterpreting, maybe a small blurb below the image may help. In a Michelson, usually only one leg would want to be moved in an out...NO? JohnFP
I uploaded a temporary one. I'll make a better one later.