Outsource.
Don't know how 'special' the process is, but I worked with the vendor that does my marks to develop a protocol to deliver exactly what I need. The mark is made by repeating the mark 6 times at different angles at pretty high output. Most of the time laser marks are just stains--called "dark marks". Those are fast and cheap marks--one pass, low power.
Machining with the laser was something new to them, and most vendors I'd tried were not capable (or willing to make it happen).
I'm thinking of adding a fiber laser next year. Pretty cool capability to have around.