Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 29 for “"optical switches"”.
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High-index-contrast electromechanical optical switches
… to replace protocol-dependent, bandwidth-limited optical networks with intelligent optically-transparent integrated photonic networks. Several electromechanical optical switches are explored with the intent of being utilized as optical switching elements in transparent, integrated photonic …
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Multi-layer, Low-crosstalk Integrated Optical Switches
… and data-intensive applications necessitates optical switching technologies with ultra-low crosstalk, high bandwidth, and nanosecond-scale reconfigurability. This work presents a comprehensive study of 3D Si-SiN-SiN tri-layer optical switches employing switch-and-select (S&S) architectures for …
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Energy Efficient High Port Count Optical Switches
… shared memory space. Large-scale high-speed optical switches tend to use a rearrangeably non-blocking architecture as this limits the number of switching elements required. However, this comes at the expense of requiring more sophisticated route selection within the switch and also some forms …
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Novel mechanical alignment and component fabrication for wavelength-selective optical switches
… bandwidth is driving an expansion of the optical switching infrastructure in the global telecom network. Two-dimensional free-space wavelength selective switches (WSSs) offer significantly increased integration over current linear WSS technology, providing a step change in switching …
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Scalable and Reconfigurable Optical Switches: From Network Design to System Application
… networks and datacentre networks. The optical switch has been the primary research topic in recent years since it shows great potential for meeting the requirements of large scalability, flexibility, energy efficiency and high bandwidth. The current optical switch fabric using …
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Providing quality of service over high speed electronic and optical switches
… multiple links are interconnected by means of switches. A switch is a device with multiple input and output links, and its job is to move data from the input links to the output links. In this thesis, we focus on a number of fundamental issues concerning the quality of service provided by …
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Semiconductor-based all-optical switching for optical time-division multiplexed networks
All-optical switching will likely be required for future optical networks operating at data rates which exceed electronic processing speeds. Switches utilizing nonlinearities in semiconductor optical amplifiers (SOA) are particularly attractive due to their compact size, low required switching …
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Optical switching and its application in Sonet-based transmission systems
This thesis is mainly a survey of optical devices used in optical logic and optical space, time and frequency division switching. These are mainly optical logic devices, optical switches, optical switching matrices, optical memories and optical wavelength multiplexers and demultiplexers and optical …
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Efficient Föster energy transfer : from phosphorescent organic molecules to J-aggregate thin film
… and matter, include room temperature low power optical switches and low threshold lasers. Recent work has shown that a J-aggregate strong-coupling device can be powered not just optically but also electrically. However, since J aggregates are engineered for their optical and not electrical …
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Scheduling algorithms for throughput maximization in data networks
… constrained data networks. We study optical networks, packet switches, and wireless networks, each of which has an assortment of features and constraints that challenge the design decisions of network architects. In this work, each of these network settings are subsumed under a …
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Engineering J-aggregate cavity exciton-polariton devices
… both VCSEL and DFB form factor), low-threshold optical switches, and photodetectors. In all of these areas, thin films of "Jelley aggregates," or J aggregates, offer a promising materials platform thanks to their narrow linewidth and high oscillator strength at room temperature, properties …
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An Experimental Investigation of Electrowetting Modulated Nucleate Boiling
… displays, lab-on-a-chip devices and electro-optical switches, etc. In this work, we report a novel application of EW in enhancing nucleate boiling heat transfer. The working approach capitalizes on the complimentary roles of hydrophobicity and hydrophilicity in the fundamental processes of …
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Customizing Multifunctional Bidirectional Neural Interfaces through Fiber Drawing
… polymer waveguides for concurrent electrical and optical neuromodulation. To address this challenge, three fabrication approaches based on fiber drawing were introduced. Each method delivered multifunctional probes featuring a low-loss transparent waveguide for optical stimulation, low-impedance …
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Mathematical modelling of all-optical buffering for ultrafast optical time division multiplexed networks.
The development of a practical solution to all-optical buffer remains a challenge for high-speed (> 20 Gbit/s) optical networks. Most of the research in the field has concentrated on building test-bed solutions, however the literature review shows little evidence in the use of mathematical models …
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Possibility of positive-pulse switching in systems of nonlinear Fabry-Perot cavities
… of using a nonlinear Fabry-Perot cavity as an optical memory requires a negative pulse input to reset the state of the cavity. The possibility of using positive pulses to turn a system of nonlinear Fabry-Perot cavities on and off is studied and it was found that positive pulse switching is …
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Computer Simulations of Faceted Nanoparticles and Carbon Nanotubes in Liquid Crystals
… in displays, nanoscale electronics, electro-optical switches, and in the development of composites with unique mechanical, thermal and/or electronic properties. In this research, two independent but directly related projects were carried out. In the first part of the research, we investigated …
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Mirror-Coupled Nanoantennas with Hexagonal-Boron Nitride Spacers
… materials are employed in a wide range of optical resonators. Combining plasmonic nanoantennas with such resonators enables the formation of nanoscale optical resonances. The novel nano-optics observed by combining these heterostructures with optically active media is laying the foundations …
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Reconfigurable Photonics based on Broadband Low-loss Optical Phase Change Materials
Optical phase change materials (O-PCMs), a unique group of materials featuring drastic optical property contrast upon solid-state phase transition, have found widespread adoption in photonic switches and routers, reconfigurable meta-optics, reflective display, and optical neuromorphic computers. …
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