Using a laser would recircumcise you. 2 laser circular incisions, remove old scar in ebetween the 2 incisions and you get a new scar. I am however not siure laser can be used for such a circ since laser risks burning tissues under shaft skin.
Lasers are used for initial circumcision with excess skin pulled beyond the top of glans, forceps crushing the skin at tip of glans and laser cutting excess off.