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 83 for “"mode coupling"”.
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Hybrid mode coupling for enhanced sensing and integrated photonics
In this dissertation, we investigate the hybrid mode-coupling approach to enhance sensing and integrated photonic applications. The coupling of photonic elements is not new; the current demand is to further explore coupling strategies within photonic systems and complementary systems to meet or …
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Selective mode coupling in microring resonators for single mode semiconductor lasers
Single mode semiconductor laser diodes have many applications in optical communications, metrology and sensing. Edge-emitting single mode lasers commonly use distributed feedback structures, or narrowband reflectors such as distributed Bragg reflectors (DBRs) and sampled grating distributed Bragg …
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Slow dynamics in supercooled liquids : matrix formalism, mode coupling and glass transition
… liquids are investigated in the framework of the mode-coupling theory (MCT). Following the real-time generalized Langevin equation in Newtonian liquids, the dynamic Gaussian factorization scheme leads to mode-coupling (MC) closures. As an alternative approach to the projection operator technique, …
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An investigation of shallow water mode coupling effects during single mode transmission
Thesis (M.S.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and the Woods Hole Oceanographic Institution), 1994.
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Analysis of internal wave induced mode coupling effects on the 1995 SWARM experiment acoustic transmissions
… for shelf generated internal wave solitons. Two models for the propagation of normal modes through a 2-D waveguide with solitary internal wave (soliton) scattering included are developed to help in understanding the very complicated mode arrivals seen at the WVLA. The simplest model uses the …
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Analysis of internal wave induced mode coupling effects on the 1995 SWARM experiment acoustic transmissions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997.
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Impulsive stimulated light scattering from glass-forming liquids : structural relaxation, orientational relaxation and testing of mode coupling theory
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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All-fiber Spectral Filters based on LP01 - LP11 Mode Coupling and Applications in Wavelength Division Multiplexing and Dispersion Compensation
… filters have the advantages of providing low coupling loss and being readily integrated into fiber-optic networks. Spectral filters made of single-mode identical or dissimilar core parallel fibers provide 3-dB spectral widths on the order of 1 to 10 nm. A spectral filter made of single-mode …
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Spectral Energy Dynamics and Wavevector Resonance in a Weakly Nonlinear Chaotic Elastodynamic Billiard
Nonlinear coupling of elastodynamic waves within an elastic body leads to spectral energy redistribution. The coupling strength can exhibit a sharp increase as a function of frequency due to wavevector coincidences between constituent waves of different wave types. The phenomenon is investigated …
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Amplitude fluctuation effects in shallow water acoustic scattering by internal waves
… in the ocean; it also investigates acoustic mode coupling effect due to internal waves. Numerically, this thesis simulates the shallow water internal wave (IW) field using the Garrett-Munk internal wave spectrum model and then evaluates acoustic transmission in the simulated internal wave …
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Magnetic and superconducting quantum critical behavior of itinerant electronic systems
… important aspects, two of them being (i) the mode-coupling effects and (ii) the behavior in the presence of disorder. We devote two projects of this dissertation to each of the two."--Abstract, page iv.
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Nonlinear dynamics of a matter-wave soliton in driven potentials
… frequency and on resonance with the internal mode frequency of the soliton. The former regime is well described by modelling the soliton effectively as a rigid particle, and in this regime energy transfer occurs due to parametric driving. In the latter regime, the extended nature of the …
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Nonlinear dynamics of a matter-wave soliton in driven potentials
… frequency and on resonance with the internal mode frequency of the soliton. The former regime is well described by modelling the soliton effectively as a rigid particle, and in this regime energy transfer occurs due to parametric driving. In the latter regime, the extended nature of the …
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Phase Behavior, Fluid Structure, and Slow Dynamics in Polymer -Colloid Mixtures: Novel Liquid State Theory and Its Applications
… with a single particle version of idealized mode coupling theory to predict the gelation boundaries and elastic shear moduli for Rg/R < 0.1 suspensions. The calculated ""transient gel lines"" are in semi-quantitative agreement with measurements in deep quenched systems and buoyancy-matched …
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Holovideo on a stick : integrated optics for holographic video displays
… features such as: polarization rotation via mode-coupling; wavelength division multiplexing of red, green and blue signals; high total pixel bandwidth; continuous horizontal parallax and extremely low cost of construction relative to comparable displays.
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Flexible Polymer Waveguides for High-Speed Short-Reach Links
… and twisting loss, crosstalk, bandwidth and mode coupling behaviour hasn’t been studied in detail when the flexure is applied to the waveguide. This research quantifies those performances when flexible polymer waveguides are being flexed and provides a useful guideline when designing those …
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Influência da interação entre modos e imperfeições na flambagem de cascas cilíndricas axialmente comprimidas
… Included in this analysis are the effects that mode coupling and initial geometric imperfections have on the non-linear buckling behaviour. It is shown, through the inspection of energy distributions, that the stabilizing membrane energy contributions are eroded substantialy during the …
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Topics in transport phenomena near the critical point
The mode-mode coupling theory of Kadanoff and Swift for the estimation of, transport coefficients near the critical point is applied to the calculation of the electrical conductivity near the superconducting transition and to the calculation of the attenuation coefficient for longitudinal sound …
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Studies of kinetic glass transition in a triblock copolymer micellar system
… state of matters. In a hard-sphere system, mode coupling theory (MCT) predicts occurrence of a glass transition when the volume fraction exceeds a certain value due to the excluded volume effect. However, Recent MCT calculations for a hard-sphere system with a short-range attraction show …
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The properties of single crystal sapphire fibers and the polarimetric optical sensor for high temperature measurements
… phase delay between the orthogonal polarization modes has been measured to be 0.0208 rad / °C m. A resolution of 2 °C has been obtained over the measurement range of 25 °C to 800 °C. It is also observed that the PMA is strongly dependent on the mode-coupling parameter. The design of the …
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