Improvement of Selective Properties of Waveguide Bragg Resonators

Abstract

A method to improve the selective properties of a waveguide resonator with Bragg reflectors on its ends is investigated. It is shown that additional mode conversions lead to a significantly rarefied spectrum of eigenoscillations. This can be achieved by using doubly periodic Bragg reflectors with different azimuthal symmetries forming four wave resonant field structures. The analysis of the dispersion properties is presented and is applicable for resonators of arbitrary relation of lengths of the reflectors and waveguide.