System for laser marking of products

A system for marking a product the product including a markable region having:

• at least one first region of a photoactivatable material, at a first depth in a wall of the product, for forming markings when activated by a first incident beam above a first threshold energy density, and
• at least one second region of the photoactivatable material, at a second depth in the wall of the product, for forming markings when activated by a second incident beam above a second threshold energy density;
• the system comprising:
• at least one laser configured to emit a beam having a beam energy density above one of the first threshold energy density and the second threshold energy density at a focal region of the beam and a beam energy density below the one of the first threshold energy density and the second threshold energy density outside of the focal region of the beam;
• a beam modulator component configured to modulate a focusing distance of the beam;
• and
• a processor communicatively coupled to the beam modulator component, the processor being configured to cause the beam modulator component to modulate the focusing distance of the beam to:
• a first focusing distance which is incident on the at least one first region for creating the markings in the at least one first region, and
• a second focusing distance incident on the at least one second region for creating the markings in the at least one second region.