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 15 of 15 for “"optical phased array"”.
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Optimization and Modeling for Optical Phased Array
… radar. As the essential component of LiDAR, the optical phased array plays a fundamental role in the beamforming for the LiDAR.
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Unconventional Optical Phased Array Design for Next-Generation Wireless Systems
… and performance characterization of thinned optical phased arrays (OPAs), aiming to achieve high-quality far-field beamforming and near-field focusing through a multi-objective (MO) optimization framework. The method addresses the challenge of selecting which antenna elements should be …
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One-Dimensional MEMS Optical Phased Array Systems Based on Surface Micro-Machined Silicon Mirrors for Scanning LiDAR Applications
Optical phased array (OPA) systems are an emerging technology for lightweight and miniature LiDAR scanners due to their compact size and construction that eliminate the need for robust physical moving parts, leading to a fast response, high reliability, and low power requirements. MEMS based OPA …
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Spatial Emission and Polarization Control in Integrated Photonics for Optical-Trapping and Trapped-Ion Systems
… results in fields including biophotonic optical tweezers and trapped-ion quantum systems. However, the majority of these demonstrations, while offering advantages in size, cost, and dense integration, lag behind their bulk-optic counterparts, limited by a lack of critical advanced …
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Integrated Visible-Light Platforms, Devices, and Systems for Augmented Reality and Beyond
… photonics is developed. Third, a novel passive optical-phased-array-based architecture and holographic image encoding methodology are developed and used to demonstrate a large-scale passive version of the VIPER display. Fourth, to enable compact and efficient modulation for dynamic encoding of …
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Integrated LIDAR with optical phased arrays in silicon photonics
… Most LIDAR systems today use discrete free-space optical components and utilize a mechanical apparatus for beam steering. Apart from the relative high cost of the system, this mechanical apparatus limits the scan rate of the LIDAR system while increasing both size and complexity. This leads to …
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Integrated optical phased arrays : augmented reality, LiDAR, and beyond
Integrated optical phased arrays, fabricated in advanced silicon-photonics platforms, enable manipulation and dynamic control of free-space light in a compact form factor, at low costs, and in a non-mechanical way. As such, integrated optical phased arrays have emerged as a promising technology for …
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Spatially-Adaptive LiDAR and Underwater Communications Using Integrated Optical Phased Arrays
… communication systems. In particular, integrated optical-phased-array-based (OPA-based) technologies, such as solid-state LiDAR and free-space optical communications (FSOC) systems, show promise to revolutionize the way we sense and communicate. This thesis enables new integrated-OPA-based …
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Nanophotonic visible light phased arrays
Previously demonstrated integrated optical phased arrays have primarily been implemented in silicon-based platforms and have therefore been limited to operation at infrared wavelengths, where silicon provides low-loss transmission. Developing integrated optical phased arrays for visible wavelengths …
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Visible-Light Integrated Photonics for 3D-Printing and Trapped-Ion Systems
Silicon photonics has enabled next-generation optical technologies that have facilitated revolutionary advances for numerous fields spanning science and engineering, including computing, communications, sensing, and quantum engineering. In recent years, the advent of visible-light integrated …
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Fresnel-focusing and bessel-beam integrated optical phased arrays for optical trapping applications
Optical trapping and tweezing - the manipulation of particles using optical forces - enables direct interaction with biological samples and non-invasive monitoring of their properties. As such, optical trapping has become a common tool in biology with applications ranging from better understanding …
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High Birefringence And Low Viscosity Liquid Crystals
… impacts in defense and display systems such as optical phased array, LCD TVs, projectors, and LCD monitors.
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Phasing of Ground-based Optical Arrays for Space Applications
Delivery of optical power to targets in space has many applications, including optical communication, active sensing, laser propulsion, and the removal of space debris. However, large monolithic optics required to obtain high directivity are costly and difficult to slew at the rates required to …
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Coherently-coupled vertical-cavity laser arrays
… vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability and manufacturing ease. Previous work on coherently-coupled VCSEL arrays has left …
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Coherently coupling multiple elements in vertical-cavity surface-emitting laser arrays
Vertical-cavity surface-emitting laser (VCSEL) arrays with three or more emitters coherently coupled are the focus of this work. VCSEL arrays have many established applications and reliable coherent VCSEL arrays are a next step in their progression. The key innovation of this work is individual …