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.
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Showing 1 to 18 of 18 for “"Optical processing"”.
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Space-variant incoherent optical processing using color
Incoherent optical processing techniques offer superior noise immunity, among other benefits, over coherent optical processing techniques. However, the complex amplitude linearity exhibited by coherent optical systems that provides a natural means for performing operations on complex functions, is …
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All-optical processing using cross-phase modulation
… by the author). When data is propagated along an optical transmission line some timing irregularities can occur such as timing jitter and phase wander. Traditionally these timing problems would have been corrected by converting the optical signal into the electrical domain and then compensating …
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Silicon Photonics for All-Optical Processing and High-Bandwidth-Density Interconnects
… technologies poised to enable penetration of optical communications deeper and more intimately into computing systems than ever before. The integration potential of power efficient WDM links at the first level package or even deeper has been a strong driver for the rapid development this field …
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Demonstrating effective all-optical processing in ultrafast data networks using semiconductor optical amplifiers
… high-bandwidth applications such as video. All-optical signal processing is one promising technique for providing the necessary capacity and offers payload transparency, power consumption which scales efficiently with increasing bit rates, reduced processing latency, and ultrafast performance. …
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All-optical processing for terabit/s wavelength division multiplexed systems using two-photon absorption in a semiconductor micro-cavity
… It is expected that next generation optical communications systems will evolve towards higher capacities by increasing individual line rates rather than the number of wavelength channels. To implement these high-speed optical networks operating at individual channel rates above 100 …
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Holographic sensing for control of flexible structures
… implemented using a holographic sensor and optical processor is presented. Real-time holography provides a mechanism for sensing the distributed shape of a broad class of one and two-dimensional flexible structures in a form that can be processed using fixed optics. The optical processing …
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Applications of superstructure fibre Bragg gratings for optical code division multiple access and packet switched networks
… the research on the implementation of all-optical code generation and recognition based on superstructure fibre Bragg grating (SSFBG) for use in Optical Code Division Multiple Access (OCDMA) systems and also in high-speed all-optical packet switched networks.These results highlight the …
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Optical pulse processing towards Tb/s high-speed photonic systems
… rates in excess of 100 Gb/s in next generation optical communications systems. Thus, to implement these high-speed optical networks all-optical processing techniques are necessary for pulse shaping and pulse routing. Two sub-systems (pulse generation and wavelength conversion), which exploit …
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Optical Interactions in Self-Assembling Systems
… material properties. Of particular interest are optical metamaterials, since the lengthscales of the nanoparticle subunits and microscale assemblies match the interacting wavelengths of light. While this overlap offers many opportunities for the fabricated structure to influence light, as well as …
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RF phase modulation of optical signals and optical/electrical signal processing
Analog RF phase modulation of optical signals has been a topic of interest for many years, mainly focusing on Intensity Modulation Direct Detection (IMDD). The virtues of coherent detection combined with the advantages of Frequency Modulation, however, have not been explored thoroughly. By …
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Aza-analogues of distyrylbenzene (DSB) synthesis, structures, and properties of 1,4-phenylenediamine bisimines (PDABI)
… AT AUTHOR'S REQUEST.] The drive for electo-optically active materials was officially initiated in 1966 with the publishing, by NASA, of a 137 page report. The "Electro-optic Projection Study" outlined the advantages of optical processing over those of electronic. These include increased …
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Accelerating Artificial Intelligence with Programmable Silicon Photonics
… silicon photonics have sparked interest in optical systems that process information at high speeds with ultra-low energy consumption. Photonic systems, which have historically been used for optical telecommunications, have recently been demonstrated to accelerate tasks in quantum simulation, …
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OPTICAL COMPUTING IN BOLTZMANN MACHINES
… theoretical and experimental work on applying optical processing techniques ot the operation of a Boltzmann machine. A Boltzmann machine is a processor that solves a problem by iteratively optimizing an estimate of the solution. The optimization is done by finding a minimum of an energy surface …
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Formation of screen-printed contacts on multicrystalline silicon (mc-Si) solar cells
… cells. Temperature distribution studies during optical processing by. attached thermocouples to cells indicates that the maximum temperature reached under the front silver metal is less. than 800 C; this is lower than the eutectic point of Ag-Si ([asymptotic to]835 C). An analysis of the …
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Hybrid Opto-Electronic Processing Systems for Integer Multiplication
… a search for alternative computing technologies, optical information processing is again in the spotlight. The application of optical techniques allows for the possibility of accelerated computation technologies. By incorporating light into the computation, this research investigates methods and …
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Modeling, design and fabrication of thin-film microcrystalline silicon solar cells
… and wavelength is developed to assist the optical design of the cell. In order to obtain acceptable short circuit current density (Jsc) from the cell, it is found that the thickness of the silicon thin film should be more than 10um. To get the best light trapping effect, the surface of the …
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One-dimensional photonic crystal / photonic wire cavities based on silicon-on-insulator (SOI)
… interest in recent research to produce faster optical processing for many telecommunications applications, as well as other applications of high performance optoelectronics. The combination of one-dimensional photonic crystal structures (PhC) and narrow photonic wire (PhW) waveguides in high …
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Quantum Optics and Quantum Information Processing in Rare-Earth-Ion-Doped Crystals
… fields of quantum optics and quantum information processing are addressed. The experiments and theoretical considerations referred to in this thesis are based on the coherent transient interaction between light and the ions in the crystals. A photon echo experiment has been performed where faint …