Silicon Photonic Devices and Circuits for Optical Communication Applications
Author: Md Ghulam Saber
Publisher:
Published: 2019
Total Pages:
ISBN-13:
DOWNLOAD EBOOK"Emerging applications such as cloud-based storage services, high definition streaming services, machine-to-machine communications, and 5G radio networks are fueling the need for faster and bandwidth-efficient optical networks. The requirements of these applications include increased capacity, and reduced cost, power consumption, footprint, and complexity. Therefore, there is a growing trend in developing integrated optoelectronic devices to meet the above mentioned requirements. Specifically, the silicon-on-insulator (SOI) platform has drawn huge research interest due to its low power operation, dense integration, and low-cost fabrication with relatively high yield using the existing complementary-metal-oxide-semiconductor (CMOS) foundries. Consequently, silicon photonics has recently entered the production phase of the technology development cycle. This thesis presents several silicon photonic devices and circuits for applications in different segments of the optical networks.In the first part of the thesis, we report several passive silicon photonic devices based on Bragg gratings, interference, and doping. First, two configurations (single-stage and cascaded) of the optical add-drop multiplexers (OADMs) are presented using Bragg gratings in a Mach-Zehnder interferometer. The single-stage and the cascaded OADMs achieved extinction ratios (ERs) of 25 and 51 dB, respectively. Second, we present two types of the transversely coupled Fabry-Perot resonators using Bragg gratings and loop mirrors. The Bragg grating-based designs offer maximum ER of 37.3 dB and maximum Q-factor of 23642 while the loop mirror-based designs offer maximum ER of 18.1 dB and maximum Q-factor of 28086. Third, we demonstrate a 120° optical hybrid using 3x3 multimode interference (MMI) coupler. The hybrid demonstrates measured excess loss of
