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 9 of 9 for “"laser propagation"”.
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Polarization characterization of nonlinear laser propagation
High power laser pulses propagate nonlinearly in media transparent to their wavelength. Self-induced nonlinearities lead to strong modifications of the spatial, spectral as well as temporal characteristics of the pulse. The interaction of the high power laser pulses with the propagation medium …
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Influence of Induced natural convection on laser propagation : analysis and interferometric visualization
… of a self-induced natural convection flow on the propagation of a high energy laser beam. The two configurations considered are of a vertical laser beam (propagation direction opposite to gravity) and a horizontal laser beam (gravity acting in a direction perpendicular to propagation) traveling …
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The refractive effects of laser propagation through the ocean and within the ocean
… the effect of the ocean water attenuation on a laser beam fired upward inside the ocean. The laser beam spreading due to scattering is approximated. The method used is a computer Monte Carlo simulation. Angular spreading of light caused by refraction at the sea surface is also studied and …
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The Scintillation Index In Moderate To Strong Turbulence For The Gaussian Beam Wave Along A Slant Path
… in the literature of mathematical modeling of laser propagation through random media. One approach to estimating scintillation is through the Rytov approximation, which is limited to weak atmospheric turbulence. Recently, an improvement of the Rytov approximation was developed employing a …
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Analysis of a laser induced plasma in high pressure SF6 gas for high-voltage, high-current switching
<p>The Laser Triggered Switch Program at Sandia National Laboratories is an intensive development study to understand and optimize the laser triggered gas switch (LTGS) for the Z-Refurbishment (ZR) project. The laser triggered gas switch is the final command-triggered switch in the machine, and …
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Investigating temperature distributions and thermal conduction effects in laser-heated plasmas relevant to Magnetized Liner Inertial Fusion
Laser heating the fuel prior to implosion is a crucial step in Magnetized Liner Inertial Fusion (MagLIF). Experiments investigating this stage have been performed at Sandia National Laboratories. In these experiments, deuterium fuel within a cylindrical pipe, or liner, was heated using 527 nm laser …
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Modelling of capillary high harmonic generation
… length must be accounted for. In addition, the propagation of the driving laser pulse in a gas-filled capillary has a significant effect on generation. To improve the understanding of these processes, this thesis presents a spatio-temporal phasematching model for capillary HHG, and a modal-based …
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Compressible Hydrodynamics of Few Body Optical Vortices
… in detail. The experiment consists of free-space laser propagation and a spatial light modulator that projects computer generated holograms for producing vortex beams. Procedures for generating effective holograms and efficiently measuring vortex beams include a novel colinear phase-shifting …
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Effects Of Atmospheric Turbulence On The Propagation Of Flattened Gaussian Optical Beams
… the atmosphere on the coherence of an optical (laser) beam, interest has recently been shown in changing the beam shape to determine if a different power distribution at the transmitter will reduce the effects of the random fluctuations in the refractive index. Here, a model is developed for the …