Spelling suggestions: "subject:"0ptical interconnection"" "subject:"0ptical interconnections""
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Optical waveguide chip-to-chip interconnection using grating couplersLi, Ming January 1995 (has links)
No description available.
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Enabling integrated nanophotonic devices in hybrid cmos-compatible material platforms for optical interconnectionSodagar, Majid 21 September 2015 (has links)
Recent impactful advances in integrated photonics undoubtedly owe much to silicon and its associated enabling platform (SOI). Although silicon has proved to be an indispensable element in many photonic systems yet it seems that it is not the ultimate solution to address all the challenges facing the photonics community. Therefore, integration of silicon with other optical materials featuring diverse properties is highly desirable. Such integration will be conducive to platforms which are naturally more capable and are suited for implementation of a wider range of optical devices and diverse functionalities. This dissertation is dedicated to design and implementation of integrated optical elements for hybrid material platforms. The basic theoretical foundation of integrated photonics is laid out in Chapter 2. In Chapter 3, an interlayer grating coupler for a specific hybrid material platform is designed, and demonstrated. Considering the fact that in almost all integrated photonic platforms, fabrication imperfections lead to an unpredictable shift in the wavelength of operation of individual devices, post fabrication tuning/trimming is inevitable. A number of widely used post fabrication trimming/tuning methods are briefly reviewed in Chapter 4 with special emphasis on a method based on electron beam exposure. In Chapter 5, an ultra-fast, low-power, and self-trimmable electro-optic modulator in demonstrated on a Si-based multilayer platform. Due to its remarkable optical and electronic properties, graphene has become a valuable material for opto-electronic applications. Integration of this novel 2D material with SOI platform is investigated in Chapter 6. Graphene-based electro-optic modulation through absorption and refractive-index change is successfully demonstrated using electrostatic gating mechanism. Chapter 7 is devoted to demonstration of a field-programmable 2 by 2 optical switch on a vertically stacked Si/SiO2/SOI platform. In Chapter 8, the peak-dragging phenomenon in a nanobeam photonic crystal cavity is studied. The optical bistability associated with this nonlinear phenomenon is of great interest for all-optical processing and sensing application. Future directions of this thesis are also discussed in the last Chapter.
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All Optical Switching ArchitecturesSathyan, Saju January 2006 (has links)
<p>In communication systems, the need for high bandwidth interconnects and</p><p>efficient distribution of large amount of data is very essential. This thesis work</p><p>addresses all-optical packet switching issues in the field of reconfigurable optical</p><p>interconnection networks for high performance embedded systems. The recent</p><p>research conducted at the Halmstad University, on high performance embedded</p><p>systems, focuses on the optical interconnection techniques to achieve ultra high</p><p>throughputs and reconfigurability at the system level.</p><p>Recent research in the field of optical interconnection networks for applications</p><p>like switches and routers for data and telecommunication industry and parallel</p><p>computing architectures for embedded signal processing use optical to electrical</p><p>conversion to switch packets. This conversion scales down the enormous bandwidth</p><p>capacity of the optical communication channels to electronic processing rates. To</p><p>maintain the high throughputs all over the interconnection networks, the optical</p><p>packets need to be maintained in optical state and switched to different part of the</p><p>interconnection network. To achieve this goal, all-optical packet switching</p><p>architectures are studied. The study is concluded with a positive outlook towards alloptical</p><p>switching technologies, and it will play a very important role in the near</p><p>future in the field of optical communication, telecommunication and embedded</p><p>systems.</p>
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All Optical Switching ArchitecturesSathyan, Saju January 2006 (has links)
In communication systems, the need for high bandwidth interconnects and efficient distribution of large amount of data is very essential. This thesis work addresses all-optical packet switching issues in the field of reconfigurable optical interconnection networks for high performance embedded systems. The recent research conducted at the Halmstad University, on high performance embedded systems, focuses on the optical interconnection techniques to achieve ultra high throughputs and reconfigurability at the system level. Recent research in the field of optical interconnection networks for applications like switches and routers for data and telecommunication industry and parallel computing architectures for embedded signal processing use optical to electrical conversion to switch packets. This conversion scales down the enormous bandwidth capacity of the optical communication channels to electronic processing rates. To maintain the high throughputs all over the interconnection networks, the optical packets need to be maintained in optical state and switched to different part of the interconnection network. To achieve this goal, all-optical packet switching architectures are studied. The study is concluded with a positive outlook towards alloptical switching technologies, and it will play a very important role in the near future in the field of optical communication, telecommunication and embedded systems.
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Design and analysis of a 3-dimensional cluster multicomputer architecture using optical interconnection for petaFLOP computingOkorafor, Ekpe Apia 25 April 2007 (has links)
In this dissertation, the design and analyses of an extremely scalable distributed
multicomputer architecture, using optical interconnects, that has the potential to
deliver in the order of petaFLOP performance is presented in detail. The design
takes advantage of optical technologies, harnessing the features inherent in optics,
to produce a 3D stack that implements efficiently a large, fully connected system of
nodes forming a true 3D architecture. To adopt optics in large-scale multiprocessor
cluster systems, efficient routing and scheduling techniques are needed. To this
end, novel self-routing strategies for all-optical packet switched networks and on-line
scheduling methods that can result in collision free communication and achieve real
time operation in high-speed multiprocessor systems are proposed. The system is designed
to allow failed/faulty nodes to stay in place without appreciable performance
degradation. The approach is to develop a dynamic communication environment that
will be able to effectively adapt and evolve with a high density of missing units or
nodes. A joint CPU/bandwidth controller that maximizes the resource allocation in
this dynamic computing environment is introduced with an objective to optimize the
distributed cluster architecture, preventing performance/system degradation in the
presence of failed/faulty nodes. A thorough analysis, feasibility study and description of the characteristics of a 3-Dimensional multicomputer system capable of achieving
100 teraFLOP performance is discussed in detail. Included in this dissertation is
throughput analysis of the routing schemes, using methods from discrete-time queuing
systems and computer simulation results for the different proposed algorithms. A
prototype of the 3D architecture proposed is built and a test bed developed to obtain
experimental results to further prove the feasibility of the design, validate initial assumptions,
algorithms, simulations and the optimized distributed resource allocation
scheme. Finally, as a prelude to further research, an efficient data routing strategy
for highly scalable distributed mobile multiprocessor networks is introduced.
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Polymer materials, processes, and structures for optical turning in 3D glass photonic interposersVis, William A. 27 May 2016 (has links)
Increasing bandwidth demands for cloud computing and autonomous applications push the need for system scaling instead of transistor scaling as predicted by Moore’s Law. Optoelectronic interconnections have the potential to enable system scaling at higher bandwidth, power efficiency, and lower cost than copper wiring. The objective of this research is to demonstrate polymer-based optical waveguides with integrated optical turning structures in ultra-thin glass interposers, for fiber-to-chip or chip-to-chip optical interconnections. The fundamental material and process challenges associated with achieving this objective are encompassed in: (1) polymer-glass interfaces and adhesion, (2) lithographically-defined polymer waveguides, and (3) integrated turning structures by inclined lithography. Process guidelines for substrate preparation, adhesion enhancement, and lithographic precision of siloxane-based polymer waveguides in glass were established by fundamentally breaking down and optimizing each process step. In addition, a new process was demonstrated to achieve, for the first time, waveguides with integrated turning structures with self-alignment and symmetry in a single exposure. The new process was enabled by fabricating pre-existing, direct-coated, metallic masks before the inclined exposure step. The demonstrated structures were imaged by polished cross-sectioning and Scanning Electronic Microscopy (SEM).
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Investigação de técnicas fotônicas de chaveamento aplicadas em arquiteturas paralelas. / Research about photonic techniques in parallel architectures.Martins, João Eduardo Machado Perea 20 March 1998 (has links)
Este trabalho apresenta um estudo sobre redes ópticas de interconexão aplicadas em arquiteturas paralelas, onde são propostos, simulados e analisados alguns modelos de redes. Essa é uma importante pesquisa, pois, as redes de interconexão influenciam diretamente o custo e desempenho das arquiteturas paralelas de computadores. O primeiro modelo de rede óptica proposto é chamado de SCF (Sistema Circular com Filas). Esse e um sistema sem colisões, onde há um canal exclusivo para controle de comunicação e cada nó possui um canal exclusivo para recepção de dados. Esse sistema tem um desempenho com alta taxa de vazão, alto nível de utilização e pequenas filas. Para a simulação da rede SCF foi desenvolvido um simulador dedicado, cuja adaptação para a simulação de outros modelos de redes, propostos nesse trabalho, foi facilmente realizada. Neste trabalho também foram propostos, simulados e analisados três modelos diferentes de chaves ópticas de distribuição para arquitetura paralela do tipo Dataflow. Os resultados dessas simulações mostram que componentes ópticos relativamente simples podem ser utilizados no desenvolvimento de sistemas de alto desempenho. / This work presents a study about optical interconnection network applied to parallel computer architectures, where is proposed, simulated and analyzed some models of optical interconnection networks. It is an important research because the interconnection networks influence directly the cost and performance of parallel computer architectures. The first optical interconnection network model proposed in this work is called SCF (Sistema Circular com Filas). It is a system without collisions, where there is a dedicated channel for communication control and each node has a fixed channel for data reception. The system has a performance with high throughput, high utilization leve1 and small queue size. For the SCF simulation was developed a dedicated simulator, whose adjust to simulate others optical interconnection network, proposed in this work, was easily performed. In this work also were proposed, simulated and analyzed three different models of optical distributing network for Dataflow computer architecture, whose results shows that single optical devises can ensure the development of high performance systems.
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Optoelectronic packaging and reliability of intra- and inter-board level guided-wave optical interconnectionChoi, Jin Ho, 1968- 04 November 2013 (has links)
We have demonstrated a flexible optical waveguide film with integrated VCSEL and PIN photodiode arrays for the fully embedded board level optical interconnection system. One of the most critical issues in the fully embedded board level optical interconnection system is the signal beam coupling between the guided-wave structure and the aperture of VCSEL (or PIN photodiode). The coupling efficiencies of spherical mirrors are calculated as a function of mirror radius. The optimum mirror radius ranges which are compatible with the fully embedded board level optical interconnection system are theoretically verified. The thermal characteristics of a thin film VCSEL are studied both theoretically and experimentally. The thermal resistances of VCSEL with variable thickness, ranging from 10 [mu]m to 200 [mu]m, have been determined by measuring the output wavelength shift as a function of the dissipated power. The thermal simulation results agree reasonably well with experimentally measured data. From the thermal management point of view, a thinned VCSEL has an exclusive advantage due to the reduction of the thermal resistance. The thermal resistance of 10 [mu]m thick VCSEL is 40 % lower than that of 200 [mu]m thick VCSEL. The theoretical analysis of thermal via effects is performed to determine optimized thickness ranges of thin film VCSEL for the fully embedded structure. Thermal resistance of the fully embedded thin film VCSEL with closed and open thermal via structures are also evaluated with the suitable VCSEL thickness reported. The high-performance computing system is demonstrated using a 16-channel optical backplane using thin film volume holographic gratings. The optical backplane contains TO-46-Can-packaged VCSELs and photodiodes as an optical transmitter and receiver, respectively. Optical packaging plates are fabricated for 4 X 8 array packaging for 16-VCSELs and 16-Photodiodes. Packaging issues including crosstalk and alignment tolerance are studied to design a low cost optical packaging scheme. Thin film volume hologram grating is fabricated on glass substrate to redirect light beams. An individual single channel performs at a 100 MHz data transfer rate. The high-performance computing system using 16-channel optical backplane is demonstrated at a 1.6 Gbps data transmission. / text
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Investigação de técnicas fotônicas de chaveamento aplicadas em arquiteturas paralelas. / Research about photonic techniques in parallel architectures.João Eduardo Machado Perea Martins 20 March 1998 (has links)
Este trabalho apresenta um estudo sobre redes ópticas de interconexão aplicadas em arquiteturas paralelas, onde são propostos, simulados e analisados alguns modelos de redes. Essa é uma importante pesquisa, pois, as redes de interconexão influenciam diretamente o custo e desempenho das arquiteturas paralelas de computadores. O primeiro modelo de rede óptica proposto é chamado de SCF (Sistema Circular com Filas). Esse e um sistema sem colisões, onde há um canal exclusivo para controle de comunicação e cada nó possui um canal exclusivo para recepção de dados. Esse sistema tem um desempenho com alta taxa de vazão, alto nível de utilização e pequenas filas. Para a simulação da rede SCF foi desenvolvido um simulador dedicado, cuja adaptação para a simulação de outros modelos de redes, propostos nesse trabalho, foi facilmente realizada. Neste trabalho também foram propostos, simulados e analisados três modelos diferentes de chaves ópticas de distribuição para arquitetura paralela do tipo Dataflow. Os resultados dessas simulações mostram que componentes ópticos relativamente simples podem ser utilizados no desenvolvimento de sistemas de alto desempenho. / This work presents a study about optical interconnection network applied to parallel computer architectures, where is proposed, simulated and analyzed some models of optical interconnection networks. It is an important research because the interconnection networks influence directly the cost and performance of parallel computer architectures. The first optical interconnection network model proposed in this work is called SCF (Sistema Circular com Filas). It is a system without collisions, where there is a dedicated channel for communication control and each node has a fixed channel for data reception. The system has a performance with high throughput, high utilization leve1 and small queue size. For the SCF simulation was developed a dedicated simulator, whose adjust to simulate others optical interconnection network, proposed in this work, was easily performed. In this work also were proposed, simulated and analyzed three different models of optical distributing network for Dataflow computer architecture, whose results shows that single optical devises can ensure the development of high performance systems.
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