Title :
Mono-Order High-Efficiency Dielectric Concave Diffraction Grating
Author :
Pottier, P. ; Packirisamy, Muthukumaran
Author_Institution :
Dept. of Mech. & Ind. Eng., Concordia Univ., Montreal, QC, Canada
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.
Keywords :
Bragg gratings; integrated optics; optical self-focusing; Bragg condition; aberration-free focusing; dielectric concave diffraction grating; dielectric materials; elliptical facets; grating diffraction; grating-distributed Bragg reflector; high-efficiency diffraction grating; integrated optics; mono-order diffraction grating; planar concave diffraction grating; unwanted diffraction orders; wavelength spreading; Bragg gratings; Diffraction; Diffraction gratings; Gratings; Indexes; Mirrors; Optical waveguides; Bragg gratings; diffraction grating; integrated optics; optical design; planar spectrometer; wavelength division multi plexing (WDM);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2012.2209111
