1.
Opt Express
; 30(4): 6129-6141, 2022 Feb 14.
Artigo
em Inglês
| MEDLINE
| ID: mdl-35209556
RESUMO
The latest advances in petawatt laser technology within the ELI Beamlines project have stimulated the development of large surface area dielectrically coated mirrors meeting all demanding requirements for guiding the compressed 30â J, 25â fs HAPLS laser beam at 10â Hz repetition rate and a center wavelength of 810â nm entirely in vacuum. We describe the production and evaluation of Ta2O5/HfO2/SiO2 ion beam sputtered coated (440 × 290 × 75)â mm3 beam transport mirrors. No crazing was observed after thirty vacuum-air cycles. A laser induced damage threshold of 0.76â J/cm2 (fluence on mirror surface) was achieved and maintained at high shot rates.