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 20 of 40 for “"Optical links"”.
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Graphene Modulators for Silicon Photonic Optical Links
… need to support Tb/s data rates. Existing optical fibre communication networks cannot support Tb/s data transmission without consuming an unsustainable amount of power. Optical transceivers send and receive information encoded in light, relying on electro-optic modulators to convert the …
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Multiple Simultaneous Optical Links for Space-Based Platforms
Space-based Free Space Optical Communications (FSOC), or lasercom, offers key advantages over Radio Frequency (RF) communications in bandwidth, Size, Weight, and Power savings, and unregulated spectrum. Theoretical and demonstrated lasercom systems have shown higher data rates for similar or equal …
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Wireless personal area networks and free-space optical links
… design of indoor (IrDA) and outdoor infrared links, as well as the performance of the higher layers of two major Wireless Personal Area Network (WPAN) technologies: IrDA and Bluetooth. Recent advancesin wireless technology have made it possible to put networking technology into small portable …
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System Analysis for Satellite Networks with Free-Space Optical Links
… parameters and performances for free-space optical satellite networks (FSOSNs), including phasing parameter, optical satellite link budget, tradeoff between network latency and satellite transmission power, and network latency minimization based on satellite transmission power constraints. …
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High Speed Optical Links Using CAP Modulation and Novel Equalisation Techniques
High speed optical links suffer from inter-symbol-interference (ISI) due to their limited bandwidth. Equalisation is typically used to mitigate ISI and therefore improve the link capacity. This dissertation explores novel equalisation techniques for carrierless amplitude and phase (CAP) modulation …
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Data-Driven Physical-Layer Optimization for RF and Optical Communications: Transmitarray Metasurfaces, Contextual-Bandit MUD, and Coherent Optical Links
… third carries the methodology onto a coherent optical link, where size, weight, and power constraints make a small-satellite deployment the natural target.</p> <p>The antenna work targets a tri-layer pixelated unit cell fabricated on Avient ABS550 by fused-deposition modeling, operated from 8 …
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Design and modeling of high speed P-i-N photodetector for 50 GB/S optical fiber links
High speed optical interconnect holds the key to the future Internet revolution; optical fibers have replaced traditional copper wires over long distances within data centers and high performance computing (HPC) due to their speed and reliability. With the increasing demand for high speed data …
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Linear Analog Front -End Circuits for Fiber -Optic Communication Systems
… electronic dispersion compensation based 10-Gb/s optical links. The design incorporates tunable emitter degeneration, hence satisfying linearity, bandwidth, and supply voltage requirements. Also, an analog multiplexer provides a wide gain tunability and enhanced linearity. The VGA achieves tunable …
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Design space exploration of photonic interconnects
… both on-chip and chip-to-chip applications. As optical links avoid the capacitive, resistive and signal integrity limits imposed upon electrical interconnects, the introduction of integrated photonics allows for efficient realization of physical connectivity that are costly to accomplish …
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Comparison of Direct and Heterodyne Detection Optical Intersatellite Communication Links
… performance of direct and heterodyne detection optical intersatellite communication links are evaluated and compared. It is shown that the performance of optical links is very sensitive to the pointing and tracking errors at the transmitter and receiver. In the presence of random pointing and …
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Vertical-cavity surface-emitting laser (VCSEL) for 50Gb/s NRZ optical link in data center
… (VCSELs) at 850 nm have been widely deployed in optical data transmission as the optical transmitters. However, the data transmission capability of commercial VCSELs used in 100 m optical links with direct non-return-to-zero (NRZ) modulation has been limited to 25 Gb/s for years. At the same …
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Toward an active CMOS electronics-photonics platform based on subwavelength structured devices
… bottlenecks, necessitating the use of optical communication with its high bandwidth and energy efficiency to further improve computing performance. Silicon photonics, compatible with CMOS platform manufacturing, presents a promising means to achieve on-chip optical links, employing …
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Receivers for energy efficient optical interconnects
… are connected with high bandwidth interconnects. Optical interconnects are increasingly deployed within the data centers to meet the growing bandwidth requirements. Both intensity modulation direct detection (IM-DD) optical links and coherent optical links are employed. The development of the …
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Analysis and applications of coupled leaky-mode, implant-defined surface-emitting laser arrays
… atmospheric sensing, free-space and fiber-based optical links, high-power laser pumps, and optical imaging. Coherently coupled arrays exhibit desirable characteristics such as low beam divergence and high brightness. However, the fabrication procedures necessary for such designs are typically …
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A Quantum Technique for Monitoring Physical Layer Security of Optical Communication
Optical fibre networks are advancing rapidly to meet growing traffic demands. Security issues, including attack management, have become increasingly important for optical communication networks owing to the vulnerabilities associated with tapping light from optical fibre link. Physical layer …
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Testing and modeling of photo-electric modulators
Optical links are a promising alternative to the electrical interconnects that are currently used between chips within a computer. A crucial part of an optical link is a modulator, a device that converts an electrical signal into an optical signal. This thesis explores the physics of how these …
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Investigating thermal dependence on monolithically-integrated photonic interconnects
Monolithically-integrated optical link is a disruptive technology which has the promising potential to remove memory bandwidth bottleneck in the deep multicore regime. Although with the advantages of high bandwidth-density and energy-efficiency, it comes with design challenges from device, …
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PI AND EMI ANALYSIS OF 3D IC SYSTEM WITH TSVS AND CO-PACKAGED OPTICS
… high-capacity, high-density, high-power optical links for data center communications, co-packaged optics is a promising solution. When the three-dimensional (3D) IC and optic engines are integrated into the same package, the design of such systems in terms of signal integrity, power …
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An optical data receiver for integrated photonic interconnects
… of transmission. This work presents a novel optical data receiver for integrated optical links. Both the optical receiver and the photodiode are monolithically-integrated in the same CMOS substrate. The highly-digital receiver senses the photodiode current using a regenerative cross-coupled …
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Millivolt silicon photonic modulators for cryogenic applications
… room temperature becomes essential. The use of optical links for such data transfer - in what is known as cryogenic optical readout - is appealing due to the low heat conduction of optical fiber and the possibility to exploit wavelength division multiplexing architectures. However, existing …
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