Increasing the angular tolerance of resonant grating filters with doubly periodic structures

Abstract

One can increase the angular tolerance of resonant grating filters without modifying the spectral bandwidth by adding a second grating component parallel to the first one. The angular tolerance and the filter linewidth can be controlled by the designer in an independent way. Numerical results show that this property permits the use of waveguide-grating filters with standard collimated beams.

© 1998 Optical Society of America

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