High-efficiency, broad band, high-damage threshold high-index gratings for femtosecond pulse compression.
High efficiency, broad-band TE-polarization diffraction over a wavelength range centered at 800 nm is obtained by high index gratings placed on a non-corrugated mirror. More than 96% efficiency wide band top-hat diffraction efficiency spectra, as well as more than 1 J/cm(2) damage threshold under 50 fs pulses are demonstrated experimentally. This opens the way to high-efficiency Chirped Pulse Amplification for high average power laser machining by means of all-dielectric structures as well as for ultra-short high energy pulses by means of metal-dielectric structures.
Canova
Frederico
F
Clady
Raphael
R
Chambaret
Jean-Paul
JP
Flury
Manuel
M
Tonchev
Svtelen
S
Fechner
Renate
R
Parriaux
Olivier
O