چكيده به لاتين
Abstract
Ultra-fast optical components and integrated photonic devices can realize high speed communication networks. Slowing down the light speed is a smart solution for compactness of the photonic components and realizing faster optical devices.
In this thesis, we review some methods and effects of slow light in telecommunication. Since the photonic crystals are one of the best structures for photonic devices fabrications, the slow light in photonic crystals is studied deeply. Some of the slow light based components are reviewed.
An innovative method for slowing down the light in slotted photonic crystal waveguide is introduced. The results shows high group index with very low group dispersion velocity over a wide bandwidth. Group index-Bandwidth product of the proposed slow ligh waveguide is more than previously introduced methods by other authors.
Group index stability over wide temperature range (25oC to 85oC) is another advantage of our proposed slow light waveguide compared with other previously introduced slow light waveguides. In other slow light waveguides, only several degrees of temperature changes cause a big change in group index.
The design of the photonic crystal directional coupler will be disused later and the effects of slow light for shortening the length of directional coupler will be studied. Then the most compact and temperature independent electro-optic switch based on slotted silicon photonic crystal coupler will be proposed. Very low activation voltage (1.52 V), very good stability over wide range of temperature (25oC to 85oC), and of course higher speed than his competitor, the thermo-optic switches, are some of the advantages of the proposed switch.
The effects of the slow light on performance of optical de-multiplexer will be studied and the thesis will be closed with summary and conclusions.
Keywords: Slow Light, Photonic crystals, photonic devices, dispersion
