Abstract
Fully dielectric diffraction gratings using Bragg mirrors that can be used in
integrated spectrometry or wavelength division multiplexing (WDM) components are
presented. Based on extended elliptical Bragg mirrors, they can preferentially select
one particular diffraction order. The geometrical design conditions are presented along
with numerical simulations for this family of gratings in which diffraction grating and
Bragg mirror are not independent, resulting in efficiencies up to 99.9%. High grating
efficiency is linked to Bragg mirror efficiency, even though wide Bragg bandwidth can be
detrimental to the grating efficiency.
© 2013 IEEE
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