Researchers develop a laser that produces the strongest ultra-short laser pulses to date

https://phys.org/news/2024-10-laser-strongest-ultra-short-pulses.html

"more reliable 550 W average (peak 100 MW) power, 5.5 MHz... lasts < ps, exit laser in regular sequence 5 million pulses p/sec... 100 μm thin ytterbium disk... mirrors send light inside laser through disk several times before leaves through outcoupling mirror, amplifying light maintaining stability...Semiconductor Saturable Absorber Mirror, reflectivity depends on light strength hitting it, coaxing into sending out short pulses (higher intensity) rather than continuous beam... machining, high harmonic frequencies, X-rays"

Related: Why ultrashort laser pulses could make low-power electron sources far more practical
https://phys.org/news/2026-04-ultrashort-laser-pulses-power-electron.html