Design and fabrication of an all-dielectric grating with top-hat high diffraction efficiency over a broad spectral range
Open Access
- 9 July 2007
- journal article
- Published by EDP Sciences in Journal of the European Optical Society: Rapid Publications
Abstract
Between 98% and 100% flat top efficiency –1st order TE diffraction over a 40 nm wavelength range centered at 800 nm can be obtained by an all-dielectric grating structure where the corrugation is etched in a high index layer unlike in the state of the art. 98% maximum efficiency and a wide-band top-hat diffraction efficiency spectrum are demonstrated experimentally opening to high efficiency femtosecond pulse compression for high average power laser machining.Keywords
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