Implementation of Bragg reflection waveguide microring resonator for optical second-harmonic generation

We propose a microring resonator with Bragg reflection waveguide (BRW) capable of simultaneously establishing the quasi-phase-matching, Bragg, and resonance conditions to achieve optical second-harmonic generation (SHG). Using numerical simulations, we suggest a comprehensive design procedure for a monolithic AlGaAs BRW microring. Due to the sensitive nature of BRW-based devices to material and fabrication tolerances, precise thermo-optic tuning method is proposed. It is shown that the designed structure can be thermally tuned in such a way that by only 6 degrees C, it can be switched to adjacent working wavelengths. Furthermore, being able to design microrings with different radii on the same wafer for SHG investigation is another advantage of our proposed device.

Automated summary

We propose a microring resonator with BRW capable of achieving optical second-harmonic generation. Numerical simulations are used to suggest a comprehensive design procedure for the microring resonator and a precise thermo-optic tuning method. The designed structure can be switched to adjacent working wavelengths by thermal tuning and microrings with different radii can be designed on the same wafer for investigation.