Photonic Microring Resonator Based DWDM System Within a Single Free Spectral Range

A micro photonic dense wavelength division multiplexing (DWDM) system using ring resonator is presented in this paper. Three reference ring radii of 1, 5, and $10\ \mu \mathrm{m}$ with radius variation method have been applied in the DWDM design. This system has been analysed within a single free spectral range (FSR) using the FSR of the reference rings from $\lambda_{1}$ to $\lambda^{\prime}{}_{1}$; they are 83.18 nm, 17.38 nm, and 8.63 nm, respectively. A standard DWDM system has a channel spacing of 0.8 nm, hence, the ring radius variation for the respective reference ring radii were 0.9 nm, 4.5 nm, and 9.2 nm, respectively to achieve 0.8 nm channel spacing throughout the FSR. Results show that 100, 22 and 11 channels are possible to incorporate within the single FSR. The systems have successfully demonstrated a 10 Gbit/s data stream per channel and therefore, support the data transmission of 1 Tbit/s, 220 Gbit/s, and 110 Gbit/s, respectively, for the DWDM system.

I. Introduction

Silicon photonics has been investigated in recent years to develop an interconnect feature on high capacity and low-cost applications as it becomes a bottleneck for the future computing and communication system [1]. Silicon based photonic components, for example silicon-on-insulator (SOI) waveguide has been ppresented, capable of large-scale photonic integration on a silicon chip. Moreover, with the progress of dense wavelength division multiplexing (DWDM) technology, a number of optical carrier signals can be multiplexed into a single waveguide, at which it develops a secure, compact, high bandwidth and speed transmission using the silicon waveguide and devices [2], [3]. Each of the optical carrier signals are independent with each other as they have distinct wavelength, to enable it to be routed, switched and merged without any interferences [4], [5]. The evolution of the photonic DWDM system for the future communication and computing system has inspired research communities to involved in doing research in this area.