I had a Viasho laser inside my Kvant laser projector. The laser diode driver portion of the system was good, but that particular laser did have thermal issues which changed with modulation frequency and duty cycle. I switched it out for UltraLaser/DHOM which kind of had the opposite problem -- good stability as far as the laser was concerned, but slow modulation. However, the slow modulation was easy to fix, by changing components on the driver.
So far a few companies have contacted me for help as a result of the post above. Always glad to offer assistance!
Best regards,
William Benner