Photonic Microring Resonator Based Wavelength Division Multiplexing System Characterization / Nur Musyiirah binti Haji Masri.

A thesis submitted to Universiti Teknologi Brunei for the partial fulfillment for the requirements for the degree of Master By Reserach in Electrical and Electrical Engineering.

ABSTRACT
Computing and communication system have been consistently improving over the past few years. With the breakthrough of wavelength division multiplexing (WDM) and dense wavelength division multiplexing (DWDM) system, high data rate transmission for the future information infrastructure in computing and communication system can be achieved.
In this research work, WDM and DWDM system based on photonic microring resonator have been designed, simulated and analysed using ring radius variation method. The microring resonator in the WDM system were designed with increasing radius of 20nm in length. Meanwhile, three types of DWDM systems; standard, super and ultra DWDM system have been designed with varying ring radius variation of 0.8nm for standard DWDM system, 0.4nm for super DWDM system and 0.2nm for ultra DWDM system to achieve constant channel spacing.

The future technological advancement based optical networking for on- chip applications are being introduced smaller and smaller in size over the decades. The selection of the reference ring radius is very important for designing on-chip WDM communication integrated circuit as it has a significant impact on the FSR, and it is responsible for determining the bandwidth and the channel capacity of the system. Hence, reference ring radii of 1, 5 and 10µm have been chosen to design, simulate and analyse the subsequent photonic microring resonator based WDM and DWDM system as it produces wide FSR.
Channel limitation analysis of the systems have been performed to investigate and analyse the maximum number of channels that can be incorporated into the system within a single free spectral range and across the S, C and L telecommunication bands. The digital signal analysis between the channels in the WDM and DWDM system were consequently studied using 10Gb/s of digital data signal. The WDM system with 20nm in length variation has shown a high-quality signal when using 1, 5 and 10µm reference ring, which allow a maximum possible data transmission of 600Gb/s, 2.73Tb/s and 5.42Tb/s, respectively. The standard, super and ultra DWDM systems of 1µm reference ring radius have offered 2.07Tb/s, 4.01Tb/s and 8.19Tb/s of data signal transmission. Whereas, the standard, super and ultra DWDM systems of Sum reference ring radius using 0.8nm, 0.4nm and 0.2nm channel spacing have shown a very good signal and allow a maximum possible data transmission of 1.93Tb/s, 3.81Tb/s and 7.86Tb/s. Last but not least, the standard, super and ultra DWDM systems with 10µm reference ring radius using 0.8nm, 0.4nm and 0.2nm channel spacing have shown a decent signal quality and allow a maximum possible data transmission of 1.94Tb/s, 3.68Tb/s and 7.55Tb/s.

The limitation of this research study is that, due to limited time and resources, the WDM and DWDM system have only been simulated so it would be meaningful to fabricate these system design in experiment and lastly, more research work on optimising the coupling of the microring resonator by varying the dimension such as width and gap separation of the waveguides in device level using Lumerical DEVICE and/or MODE is highly demanded, especially for the 1 um reference ring in ultra DWDM system.
Nonetheless, the potential of this WDM and DWDM system based on photonics microring resonator using ring radius variation method would be able to mitigate the demand of the future state-of-the-art computing and communication system and they will, undoubtedly, be able to suffice the high- speed optical data transmission system for the future computing and communication system.

Thesis (Degree) - Universiti Teknologi Brunei, 2019

Includes bibliographical references (page 100-107)