Highly efficient transmission gratings in fused silica for chirped-pulse amplification systems.
We report on highly efficient transmission gratings in fused silica with a grating period of 800 nm generated by electron-beam lithography. At a wavelength of 1060 nm, 95% diffraction efficiency is achieved under Littrow conditions. The damage threshold, extremely enhanced compared with conventional gold-coated diffraction gratings, makes these gratings the key elements in high average power (>100 W) femtosecond fiber chirped-pulse amplification systems.
Clausnitzer
Tina
T
Institute of Applied Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, Jena 07743, Germany. clausnitzer@iap.uni-jena.de
Limpert
Jens
J
Zöllner
Karsten
K
Zellmer
Holger
H
Fuchs
Hans-Joerg
HJ
Kley
Ernst-Bernhard
EB
Tünnermann
Andreas
A
Jupé
Marco
M
Ristau
Detlev
D