Abstract- Inserting a finite straight waveguide above the microring can causes dual resonance in it. Each resonance is created by the waves with the same phase in the microring. The resonator have been modelized by using transform matrix method. In this paper the variations of the resonator characteristics such as FSR, FWHM, peak distance of dual resonance and quality factor versus their parameters have been investigated. In optimum condition a great quality factor is achieved. This system can be used whereever two high intensity close wavelength are needed

Keywords: Dual resonance, Microring, Resonator, Waveguide

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