Femtosecond lasers with BiBurst enhance ablation speed of silicon by a factor of 23

https://phys.org/news/2023-04-femtosecond-lasers-biburst-ablation-silicon.html

"grouped in MHz envelopes (BiBurst mode... increase ablation speed silicon without deterioration ablation quality... higher total energy to ablate silicon without inducing air ionization due to lower intra-pulse intensities... avoid air ionization, maintain higher ablation efficiency, higher ablation speed than single pulse GHz burst or single-pulse mode... increasing laser intensity increases ablation rate... higher intensity femtosecond laser pulses often suffers air ionization damage and excessive heat generation"