Free research article:

https://arxiv.org/abs/2509.08092

TLDR:

This is not a new kind of laser.

They have developed a method of growing on semiconductor wafers a kind of crystal with non-linear optical properties (Ta2O5, tantalum oxide, like in the tantalum electrolytic capacitors).

With a non-linear crystal, there are many variants of transforming the color of a laser, e.g. by generating harmonics, by non-linear mixing light from lasers of different colors or by pumping with the laser a parametric oscillator that produces a different color from that of the laser.

You may be able to produce almost any color, but not with a single device, and the energy efficiency of producing various colors can be very different.

This is similar to how green laser pointers work. Because unlike for red or for blue, there are no good green semiconductor lasers, the green laser pointers have an infrared laser whose output is converted into green light by a non-linear crystal.