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Title: Silicon microring resonator-based devices for wavelength-division-multiplexing optical communications
Authors: Sayarath, Aimé
Issue Date: 2011
Abstract: In this thesis, we model and experimentally demonstrate a number of silicon microring resonator-based optical switches and optical delay lines. We propose silicon feedback-waveguide-coupled microring resonator-based devices for optical switching and hitless tuning. We also measure the optical delay in the fabricated feedback-waveguide coupled microring resonator. Finally, we demonstrate a proof-of-concept experiment of a 3×3 matrix switch used as an optical router. We propose a silicon feedback-waveguide-coupled microring for optical filtering. Our proof-of-concept experiment shows an extinction ratio modulation from 0 dB to 18 dB at a fixed wavelength with a resonance Q of 4000. We propose to further improve the device performance by using a large number of coupled microrings and implement a Vernier-effect design. We model a feedback-waveguide-based fourth-order hitless filter showing a FSR larger than 32 nm, a 43 dB channel extinction ratio, a 3 dB-bandwidth of 12 GHz and a 12 dB channel isolation, which is potentially useful for wavelength-division-multiplexing optical communications. We present time-domain measurements of 1 Gbit/s and 10 Gbit/s time delayed Non-Return-to-Zero-signals in a feedback-waveguide-coupled microring resonator device. We demonstrate a maximum of 37 ps and 28 ps time delays for 1 Gb/s and 10 Gb/s bit rates respectively, with open eye-diagrams. We also model a delayed NRZ-modulated signal based on the Fourier-transform analysis and the modeling results show consistency with the experimental results. Finally, we experimentally demonstrate an electro-optical 3×3 matrix switch using microring resonators fabricated on a silicon-on-insulator substrate. Among the array of nine microrings, the five functional microrings enable the setup of multiple routes for the input light as a proof-of-concept. The device shows sub-nanosecond switch-on and –off times for optical paths establishment.
Description: Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2011
xvi, 94 p. : ill. ; 30 cm
HKUST Call Number: Thesis ECED 2011 Sayara
Appears in Collections:ECE Master Theses

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