You don’t need a big laser to make laser-induced graphene. Scientists at Rice, the University of Tennessee, Knoxville, and Oak Ridge National Laboratory are using a very small visible beam to burn the foamy form of carbon into microscopic patterns.
http://dateline.rice/feb-13-news-release-tour
An article features Rice research into developing a method to create laser-induced graphene with features more than 60% smaller than macro versions and almost 10 times smaller than typically achieved with an infrared laser. Co-authors James Tour, the T.T. and W.F. Chao Chair in Chemistry and a professor of computer science and of materials science and nanoengineering, and postdoctoral researcher Michael Stanford are quoted.
ChemEurope.com
http://dateline.rice/feb-14-tour
https://www.chemeurope.com/en/news/1164955/graphene-forms-under-microscope-s-eye.html