John Laughlin at Technological Artisans can order you a Goldenstar 445 module with integral optics inside the diode can to correct the beam shaping. I have the corrected, circularized, blues inside my 5 watt projector and I know they will come close to your specifications. In my case the beam is is a rounded, symmetrical, square in the near field, and if I were to bother to spatial filter it, it would be beautiful and reasonably circularized.
It is a beam shaping lens implanted on the diode mount, then the diode is gas filled and re-canned, not something you can do at home.
Steve
Last edited by mixedgas; 12-16-2021 at 12:37.
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When I still could have...