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 11 of 11 for “"waveguide arrays"”.
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Optical Wave Propagation In Discrete Waveguide Arrays
The propagation dynamics of light in optical waveguide arrays is characteristic of that encountered in discrete systems. As a result, it is possible to engineer the diffraction properties of such structures, which leads to the ability to control the flow of light in ways that are impossible in …
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An investigation of lattice dynamics using waveguide arrays
… a periodic array of evanescently coupled optical waveguides is described by the paraxial equation. This Schrodinger-like equation closely resembles the Schr¨odinger equation describing the motion of a particle in a periodic potential. This close correspondence means that the evolution of the light …
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Development of Snapshot Imaging Spectrometer Using High-Density 3D-Printed Waveguide Arrays
… development of two generations of miniaturized, waveguide-based imaging spectrometers fabricated using two-photon polymerization (2PP), a high-precision additive manufacturing technique. The first-generation system demonstrates the feasibility of 3D-printed optical fiber arrays for spectral …
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3-D optical waveguide arrays for in-vivo optogenetics : development and application
… 3D targets in neural tissue. Silicon oxynitride waveguide fabrication was optimized for integration onto insertable silicon probes. The waveguides have a propagation loss of-0.4 dB/cm. Right-angle corner mirrors were fabricated at the outputs of the waveguides with losses measured to be 1.5 ± 0.4 …
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Discrete Wave Propagation In Quadratically Nonlinear Media
… from biology through chemistry to physics. Arrays of evanescently coupled, equally spaced, identical waveguides are prime examples of optical structures in which discrete dynamics can be easily observed and investigated. As a result of discretization, these structures exhibit unique …
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Frequency conversion in nonlinear optical waveguides : from classical to quantum applications
… in fabrication technologies of micro- and nano-waveguides. In this dissertation an in-depth analysis of quantum and classical properties of light traveling in nonlinear optical waveguides, directional couplers and waveguide arrays is performed. The concepts of spatial and temporal dispersion, …
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Frequency conversion in nonlinear optical waveguides : from classical to quantum applications
… in fabrication technologies of micro- and nano-waveguides. In this dissertation an in-depth analysis of quantum and classical properties of light traveling in nonlinear optical waveguides, directional couplers and waveguide arrays is performed. The concepts of spatial and temporal dispersion, …
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Novel mechanical alignment and component fabrication for wavelength-selective optical switches
… and development of the two-dimensional waveguide arrays required to realise the input and output ports. Both conventional single-mode fibres and waveguides fabricated with ultrafast-laser inscription (ULI) are investigated. The ULI waveguide technology is verified as an enabling …
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SYNTHESIS OF POLYMER STRUCTURES FOR INCREASING ENERGY CONVERSION IN SOLAR CELLS
… expand the incident angles. I proposed a polymer waveguide array, which is able to bend the light from a large incident angle to the normal direction. I adopted photolithography with a blue LED to polymerize the waveguides. This is a high-speed, low-cost process to fabricate large area waveguides. …
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Photon Statistics in Disordered Lattices
… lattice, an array of evanescently coupled waveguides, is illuminated with an extended coherent optical field, discrete speckle develops. Numerical simulations and analytical modeling reveal that discrete speckle shows a set of surprising features, that are qualitatively indistinguishable in …