Improving the Triple Coupled Ring-Resonator Performance as an Optical Filter

Abstract

In this paper, a three ringresonator serially coupled is considered as an optical filter. We are going to improve the performance of the designed optical filter by increasing the quality factor and finesse of filtered wavelengths. The first and last rings are coupled to the bus waveguides that carry the input and output fields. The effect of coupling parameters and ring radii on the filtering of operating wavelengths which are between 1545-1550 nm with narrow Free Spectral Range (FSR) less than 0.5 nm is investigated. Using the transfer matrix method, all the rotating and output fields are obtained. FSR, Full Width at Half Maximum (FWHM) and Finesse (F) are evaluated by the wavelength response plots of the output ports obtained in Wolfram Mathematica. The behavior of structure is analyzed by a new approach in order to filter the resonant wavelengths of the transmission channel with higher finesse.

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].…”

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 filters and creating a delay line in signal processing by methods of delay line signal processing and transfer matrix theory 11 , 18 – 21 .…”