" I know the basics of lasers" like what --they produce light that can burn things? How old are you?
Sounds like you trolling the forum or playing a joke more than anything else but maybe not.
So you have a module with diode you don't know what tp do with and may have ruined with direct application of electricity and a heatsink that may or may not fit into any host + misperceptions and daydreams about lasers and "burning" things?
Start over and research how to make/assemble a hand held laser would be a good idea then begin obtaining what you need.
You don't pay attention --as everyone has told you many times--there are no diodes with a circular output---so quit saying you want that--it doesn't exist except in your imagination.
You want a 2/4W hand held to "burn" things for whatever reasons--just buy/purchase one complete---or--you made a heatsink--so now prepare a host that will accept that heatsink with module and driver and contact boards + a battery and so on and assemble it --see for an idea of what is needed to be done:
Survival Laser USA Home
OR use the LPF search function at the bottom of the page --there are hundreds of builds and many tutorials on how to accomplish same, there.