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 46 for “"Sidebands"”.
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Flux-tunable superconducting transmons for quantum information processing
… a superconducting resonator using flux-driven sidebands. This is the first experimental observation of flux-driven sidebands in a superconducting system. This process also allows photon swaps between qubit and resonator to first order in the qubit-resonator coupling strength. I will detail an …
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Design of Submicron Structured Guided-Mode-Resonance Near-Infrared Polarizer
… (ER) of around 300 with a moderated level of sidebands. The 700nm grating width and 1200nm grating period satisfied the microfabrication requirements and achieved the low-cost objective of this research. The ER increases with increasing the wire grid thickness but in this case, its resonance …
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Raman Scattering Study of Interactions of Cyanide Impurities in Potassium-Chloride Under Variation of Temperature and Concentration (near-Neighbor Pairing, Davydov Splitting, Motional Narrowing)
… positions and intensities of downshifted sidebands are explained by this model.
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Wideband optical frequency comb generator using a phase velocity-matched lithium tantalate electro-optic modulator
… at the carrier frequency with hundreds of sidebands spaced at the modulation frequency, with a comb span limited only by the material dispersion of the modulator. We present the design, construction, and testing of an optical frequency comb generator using lithium tantalate as a modulator …
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Efficiency Improvement Strategies and Control of Permanent Magnet Motor Drives
… PMSM but without having significant low ordered sidebands of currents. Both these methods are applicable to existing types of permanent magnet motors and hence do not upset their existing optimized designs.
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Baroclinic instability of a meridionally varying basic state
… this model). The enhanced importance of neutral sidebands and the details of the evolution are interpreted as being consequences of the structure of the eigenmodes of the linear problem. It is shown in chapter three that, near minimum critical shear, meridional variation of the potential …
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Simulation of ionospheric plasma heating experiments in the versatile toroidal facility
… VTF heating experiments are: (1) Langmuir wave sidebands both up- and down-shifted from the pump frequency that decrease monotonically to the noise floor in tens of MHz, (2) lower hybrid waves in a broad band from 35 - 150 MHz, with maximum power occurring at 50 - 90 MHz, (3) both Langmuir and …
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A study of the effects of linear networks on FM waves
… only a relatively small number of these sidebands have significant influence on the total makeup of the waveform. The number of significant sidebands is proportional to the value of modulation index. When the modulation index is high, the number of significant sidebands is very large and …
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An acoustic bubble density measurement technique for surface ship waters
… The bubbles themselves then radiate sound at the sidebands of higher frequency. The frequency of the return sound is proportional to the bubble sizes present. The Dual Frequency Pump Method of bubble detection can differentiate and count many different sized bubbles and is, therefore, well suited …
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Coherent atom-light interactions in multi-level systems
… and this is shown to give rise to frequency sidebands which offer a promising way of determining dc electric fields.
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Interactions of intense optical and extreme-ultraviolet lasers with atoms and solids
… pulses accompanied on either side by smaller sidebands originating from the two-color (FEL and optical laser) above-threshold ionization. These sidebands show strong variations of their amplitudes as a function of both the intensity of the optical dressing field and the relative orientation of …
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Quantification of linear and nonlinear energy transfer processes in a plane wake
… important role in the transfer of energy to the sidebands and the valleys between the peaks. The results also show that, while energy-transfer rates in natural transition are lower than in controlled transition, the random nature of wave excitation in natural transition causes energy transfer to …
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Depletion, quantum jumps, and temperature measurements of ⁸⁸Sr⁺ ions in a linear Paul Trap
… us to observe a red spectrum with secular sidebands and calculate an ion temperature of 6.8 +4.4 / -2.2 mK.
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Simulation Studies of Parametric Processes Associated with Ionospheric Electromagnetic Radiation
… for the generation of the down-shifted sidebands, the downshifted peak DP and the downshifted maximum DM. In particular, the lower hybrid decay instability LHDI and the ion cyclotron decay instability ICDI are studied in detail. The theory is used to provide the angular regime, with …
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High-Speed and Power Efficient Integrated Electro-Optic Modulators
… In a proof-of-concept experiment, I generated sidebands up to 50 MHz around a carrier signal near telecom wavelengths by applying sinusoidal modulation signals at one arm of the MZI. Using a self-heterodyne measurement system I estimated a half-wave-voltage-length product (VπL) of ∼9.4 V.cm at …
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Optical generation of mm-wave signals for use in broadband radio over fiber systems
… frequency is required. One or both sidebands were ASK-modulated with baseband data rates of up to 10 Gbps. Optical single sideband modulation proves to be dispersion resilient as error free transmission was demonstrated after 53 km of single mode fiber transmission for data rates up …
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Synchronous Sampling Sideband Orders from Helical Planetary Gear Sets
… Dynamics field. In the automotive industry these sidebands have been found to produce a poor sound quality, resulting in customer dissatisfaction and warranty returns. In the interest of continued product improvement, research and development must resolve uncertainties in the current design …
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First Search for Gravitational Wave Coincident Neutrinos in a Liquid Argon Detector with DEAP-3600
… be used to reduce backgrounds and reserve data sidebands for comparison. During its second fill from 2017-2020, DEAP-3600 recorded data in conjunction with seven such merger events observed gravitationally by LIGO. Upon examination, there is no statistically significant evidence of neutrinos …
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Study of exciton localized by random potential in indirect gallium arsenide phosphide alloys
… energy (2 meV) and prominant X-point phonon sidebands. Its wave function is effective-mass-like and is associated with the X-point in K-space. We interpret the MO band as due to excitons localized by the random potentials in the alloys. Lifetime measurements show that the Mx/0 excitons are …
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Wavefront modelling and sensing for advanced gravitational wave detectors
… technique based on transverse higher order mode sidebands is demonstrated on an optical tabletop and its applications to mode mismatch sensing in aLIGO is discussed. A new optical modelling framework based on linear canonical transformations and signal flow graph theory is also presented.
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