The purpose of ultra short light beams, if I read it correctly, is to be able to measure extremely small and shortlived things like atoms. The second beam being produced disrupts that.

The problem was that scientists and companies couldn’t control the second beam being created, and still don’t understand why it’s created. But they did create a method to reliably pair them in a predictable way, paving the way to circumvent the problem and provide clarity into the measurements of extremely small and shortlived objects.

That’s it. Nothing super groundbreaking I think