Design and Simulation of an Integrated Optical Resonator and its Application in Integrated Microwave Photonic Oscillators

Microwave photonic oscillator based on optical resonator is one of the leading technologies in the field of microwave signal generation with low phase noise. There are several advantages of using an integrated optical resonator as an energy storage optical element in a microwave photonic oscillator instead of a long optical fiber, such as it significantly reduces dimentions of the oscillator, reduces sensitivity to environmental conditions, etc.. In this paper, two integrated Bragg grating optical resonator are designed and simulated and their applications in an integrated microwave photonic oscillator is investigated. Two types of integrated optical resonator are designed and simulated; I) phase shifted Bragg grating, and II) Moiré Bragg grating. Both resonators have resonance at 1549 nm. The simulated resonators are used in a microwave photonic oscillator and oscillate at a frequency of 20 GHz. Phase noise of the oscillators is calculated based on the Leeson model. By using these integrated optical resonators a phase noise of about -93 dBc/Hz at 10 kHz offset frequency from 20 GHz oscillation is achieved.