Coupled resonator-induced transparency on a three-ring resonator

Abstract

The coupled resonator-induced transparency (CRIT) phenomenon, which is analogous to electromagnetically induced transparency in atomic systems, can occur in an original integrated optical resonator system due to the coherent interference of the coupled optical resonators. The system was composed of three ring resonators on silicon, each with the same cavity size, and the optical coupling to the input and output ports was achieved using grating with a power coupling efficiency of 36%. A CRIT resonance whose spectrum shows a narrow transparency peak with a low group velocity was demonstrated. The quality factor of the ring resonator can attain a value up to 6×10 4 , and the harmonic wavelength can be controlled by adjusting the temperature. The through and drop transmission spectra of the resonator are reconciled well with each other and also consistent well with the theoretical analysis.

High Side-Mode Suppression Ratio with a Vernier effect Single-mode Laser Using Triple Coupled Microrings

“…To address this challenge, we need to use a different structure compared to the previous works, so that by utilizing the design of adjustable parameters in the fabricating process, such as the radius of the microrings and the air gap in the size-mismatched triple mutually microrings laser, this single-mode operation can still be maintained in high pumps without any side or high order modes. In the previous works, all the structures presented in the arrangement of three, multi or cascading rings are either passive or have been investigated theoretically and numerically for various applications such as lters and creating a delay line in signal processing by methods of delay line signal processing and transfer matrix theory [11,[18][19][20][21].…”

Simulating the effects of refractive index difference on the coupling efficiency of periodically segmented waveguide mode converter

“…Through integrating waveguides [1,2], resonators [3,4], arrayed waveguide grating [5] and other optical processing components on the micro/nano-scale, the integrated photonic chip can realize low-power and small-size on-chip optical function integration. However, because of the small-size characteristics of the waveguide that connects with the optical components to achieve cooperative operation, the large dimensional difference between the fiber mode [6] and the waveguide mode [7,8] makes their coupling difficult, and the inefficient signal transmission between the fiber and the chip becomes a key problem which restricts the performance of the integrated photonic chip.…”