Clausnitzer Tina, Limpert Jens, Zöllner Karsten, Zellmer Holger, Fuchs Hans-Joerg, Kley Ernst-Bernhard, Tünnermann Andreas, Jupé Marco, Ristau Detlev
Institute of Applied Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, Jena 07743, Germany.
Appl Opt. 2003 Dec 1;42(34):6934-8. doi: 10.1364/ao.42.006934.
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.