Are you building a projector from scratch or repairing/upgrading an existing projector ?
The NUGM03 comes with it's own integrated lens which you must remove the protective can to get rid of and you will want to get rid of it, that said there is the ndg7475 and ndg7575 which have normal window cans and you can get the nugm03 recapped with a window can and inert gas back fill from ebay........then you will want to match beam specs as well as possible with your other wavelength lasers if your projector will also have for instance red and/or blue..........tell us more about want you want to do and your other lasers beam specs, otherwise I have no idea what lens or correctives you will need.
Also to use a PBS cube you will either need to rotate one laser 90 degrees or use a waveplate, but we are putting the cart before the horse, 1st tell us more about your projector and what beam specs you need to accomplish.
Just an update from my diode I bought almost a year ago. Still pushing hard with gball removed. Settled on a 2 element lens with the popular beam expander here(forgot it's name). I do have a bad habit of changing lenses(I have a lot!) frequently. I suppose its just for the off chance I get better results from a different lens style or coating. Anyway, I'm careful to avoid crap dropping on the emitters facet but still with all the lens changes I haven't yet suffered a (meltdown). I seem to always ruin blue diode windows with baked on dust, I then decan the blues to save them but they never last long. Maybe it's luck but I'm even more convinced the 450ish diodes are backfilled will inert gas. Both may be backfilled but the green semiconductor material seems much more resistant to degradation running decanned that the blues.
LED driver at 2.3A has caused no problems. I've run long duty cycles in the old Rick trent aluminum HS as well. Artic Silver 5 seems to make a big difference compared to the cheap white silicone compound I was using.
Did anyone measure wavelength on these? Read the thread and someone was to do this but missed the answer. I’d like to see if any are pushing 530. I miss that green. Really 540 is more what I want. That’s green to me. I saw the dpss 545 but diode 543 would be amazing.