System and method for laser modulation

A laser system comprising:

• a laser;
• a laser beam positioner configured to direct a laser beam emitted from the laser to at least a first laser beam spot at a first location and a second laser beam spot at a second location spaced from the first location on a target surface, wherein the first and second laser beam spots have different areas;
• and
• a laser output modulator configured to modulate a laser power output from a first laser output level when the laser is directed at the first laser beam spot, to a second laser output level when the laser beam is directed at the second laser beam spot, such that a laser power density is constant between the first laser beam spot and the second laser beam spot.