The laser doesn't seem to be a core requirement of the system, it's mainly used as a very short bright illumination source and isn't part of the up conversion system.

The full experimental setups are available in the supplemental materials: https://onlinelibrary.wiley.com/action/downloadSupplement?do...

Full paper: https://onlinelibrary.wiley.com/doi/10.1002/adma.202402777