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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 30,
  • Issue 17,
  • pp. 2922-2928
  • (2012)

Mono-Order High-Efficiency Dielectric Concave Diffraction Grating

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Abstract

A planar concave diffraction grating for integrated optics is created by using a grating-distributed Bragg reflector based on dielectric materials. By combining the Bragg condition which leads to very high reflection with the grating diffraction condition which provides wavelength spreading, a mono-order diffraction grating was built with the use of elliptical facets. A computed grating efficiency of 99% was achieved by this new proposed configuration of mono-order grating by suppressing unwanted diffraction orders, while keeping aberration-free focusing.

© 2012 IEEE

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