Making a femtosecond laser out of glass

https://phys.org/news/2023-09-femtosecond-laser-glass.html

"1 mirror sits in groove with micromechanical flexures stir mirror when exposed to fs laser light, laser is used 2nd time to align mirrors and create stable, small scale fs laser... extreme alignment resolutions, down to sub-nm... kW peak power and emitting pulses <200 fs... laser eye surgery, non-linear microscopy, spectroscopy, laser material processing and sustainable data storage"