Lasers produce monochromatic light. (One wavelength, no overtones.) A diffraction grating cannot separate that into separate colors. There is more to this story.
The only thing I can think of, right off the bat, is that they’ve created a filter that is so small it will disperse. So this is “laser” light without the specific Nobel gasses.
Which would be great.
But then my inner cynic also says that the author knows nothing of what they were told and published a garbage article for the paycheck. Occums Razor.