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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 150 for “"coupler"”.
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Optimized grating coupler designs for integrated photonics
… deals with the optimization of complex grating couplers for SOI platforms to couple light from a specific coupling scheme and it is divided in 4 sections. First, Chapter 2 presents in details the customized design routine, developed during my PhD, based on a Particle Swarm Optimization, an …
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Improvements in fiber optic coupler fabrication techniques
A novel coupler measurement station and technique for manufacturing fused biconical tapered multi-port multimode couplers with improved uniformity among ports is presented. Improvement in the uniformity of the couplers is achieved by diffusion of the minimum taper region of the coupler. The …
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A Thin Film Coupler for Microwave Harmonic Generation
Made available in DSpace on 2014-12-08T22:24:30Z (GMT). No. of bitstreams: 1 6910720.pdf: 3029030 bytes, checksum: c603ea8cc9af5c5868e8808140aca318 (MD5) Previous issue date: 1968
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Integrated optical multiple waveguide coupler switches and lenses
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science.
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Efficient out-of-plane microphotonic fiber-to-chip coupler designs
… new strategies for efficient fiber-to-chip coupler design and to come up with design rules based on these strategies and a competent device design. Some of the previous research in the area of coupler design is reviewed, and a novel out-of-plane fiber-to-chip coupler design that is based on …
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Theory, Design, and Fabrication of Diffractive Grating Coupler for Slab Waveguide
… design and fabrication of a diffractive grating coupler. The first part of the design process is to choose the period of the grating coupler based on the desired coupling angle. The second part of the design process is to choose the geometry of the grating that gives maximum coupling efficiency …
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The Quarton Coupler for Near-Ultrastrong Nonlinear Light-Matter Coupling in Superconducting Circuits
… In this thesis, we develop the theory of quarton couplers and experimentally demonstrate, for the first time, a near-ultrastrong 𝜒/max(𝜔ₐ, 𝜔 subscript 𝑏) = (4.852 ± 0.006) × 10⁻² nonlinear coupling of a superconducting artificial atom and a nearly-linear resonator. We also show signatures of …
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The synthesis of four-bar linkage coupler curves using derivatives of the radius of curvature
… linkages with approximate portions of their coupler point curves specified are developed. The necessary equations are derived and computer programs using these equations which have been integrated into a complete synthesis procedure are set forth. If a body, or a mechanism link, is in plane …
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Multi-channel solutions for optical labelfree detection schemes based on the interferometric and grating coupler principle
… Results from measurements where the Grating Coupler and the Young-interferometer are compared regarding the suppression of the response to nonspecific binding are presented. The present noise resolution of the Young-interferometer was determined to Delta-N=3*10-8 which corresponds to a …
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Reactive power compensation, system and voltage stability of an industrial network with short circuit limiting coupler
… stability conditions. A short circuit limiting coupler is designed and the transient and voltage stability studies are performed with a short circuit limiting coupler (SLC) applied at the two 132 kV incoming supply lines from Eskom. The simulations are based 011 solving ordinary loadflow cases …
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Miniaturized 3--D Mapping System Using a Fiber Optic Coupler as a Young's Double Pinhole Interferometer
… systems. This research used a fiber optic coupler to project a fringe pattern onto an object to be profiled. The two outputs fibers of the coupler were brought close together to form the pinholes of a Young's Double Pinhole Interferometer. This provides the advantages of this simple …
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HIGH EFFICIENCY EDGE COUPLER, NOVEL NONLINEAR OPTICAL POLYMERS WITH LARGE KERR-COEFFICIENT AND AUTOMATIC LAYOUT GENERATION IN SILICON PHOTONICS
… this research is to design high-efficiency edge couplers. To achieve this goal, loss mechanisms of basic inverse taper couplers are analyzed and experimentally verified. Then a cantilever-encapsulated inverse taper is demonstrated to further lower coupling loss compared to basic inverse tapers. …
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Fiber-Optic Michelson Interferometer with Faraday Mirrors for Acoustic Sensing using a 3 × 3 Coupler and Symmetric Demodulation Scheme
… to eliminate po- larization fading. A 3 × 3 coupler is used as the beamsplitting component, and a symmetric demodulation algorithm is applied to recover the phase signal. This sensor has a theoretical resolution of 5.5 pico-strains and room to improve. Such improvements are discussed in the …
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Vertical waveguide-coupled microring resonator: Design and simulation
The frequency-selective waveguide coupler is an important component of wavelength division multiplexed (WDM) optical networks. The structural design of the coupler determines the performance, size, and spectral response. Recently, Chin and Ho demonstrated a conformal transformation method in …
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Integrated optical analog-to-digital converter
… - ring resonator filter bank and fiber-to-chip coupler -are designed. A novel coupler from a standard single mode fiber to a strongly confining silicon waveguide is proposed. The results of characterization of the filter bank and fiber-to-chip coupler fabricated on the silicon-on-insulator …
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Fabrication of optical-mode converters for efficient fiber-to-silicon-waveguide couplers
… This work is based on a horizontally-tapered coupler, in which light from an optical fiber is coupled into a large polymer waveguide and then gradually transferred to a smaller silicon waveguide whose width increases with distance along the guide. Several devices were designed and fabricated …
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Wideband rotary transformer for VHF use
… has been applied to the design of a VHF rotary coupler that has a bandwidth ratio of 1000:1, and that requires no physical contact between the stator and rotor. A combination of balanced and unbalanced transmission line theory has been used to predict the performance of the coupler, and …
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Fiber to waveguide couplers for silicon photonics
… from their unequal sizes. Therefore, we employ a coupler, which acts as an intermediary device to reduce loss through mode and index matching, and provide alignment tolerance. This thesis presents a potential fiber-to-waveguide coupler design for use in integrating such networks. A quadratic index …
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