https://joewiedemann.info/tags/optics/Recent content in Optics on Joe WiedemannHugoen-usMon, 10 May 2021 00:00:00 +0000https://joewiedemann.info/research/me-simulation/Mon, 10 May 2021 00:00:00 +0000https://joewiedemann.info/research/me-simulation/<h2 id="project-summary">Project Summary</h2> <p>Senior thesis work in extracting coupling parameters for demonstrated superradiance from strain-tuned quantum dots in a Naval Research Labs experiment. For this work, the entire simulation was written in MATLAB for Hilbert spaces that represent distinguishable emitters and represented by total angular momentum. Computations were ran primarily locally.</p> <h2 id="objectives">Objectives</h2> <p>The simulation work focused on:</p> <ul> <li>Creating a first-principles models to re-create experimental results from NRL collaborators</li> <li>Writing a master equation suite to develop simulation of a quantum system connected to an adiabatic bath</li> <li>Developed wrappers to scale coupling operators to arbitrary hilbert space</li> <li>Evaluated Superradiant behavior based on second-order photon correlation</li> <li>Developed mechanisms to evaluate effects of coherent and incoherent driving fields</li> </ul> <h2 id="featured-plots">Featured plots</h2> <p>Ultimately the master-equation model was able to match the experimental data taken by the Naval Research Lab using only 4 free parameters.</p>https://joewiedemann.info/publications/oam-scintillation/Sun, 01 Mar 2020 00:00:00 +0000https://joewiedemann.info/publications/oam-scintillation/<h2 id="summary">Summary</h2> <p>This work found preliminary evidence that imparting orbital angular momentum onto Gaussian-mode laser beams can weakly improve their intensity stability in atmospheric turbulence. The experiment required building an 890-meter optical link across the Severn River and co-aligning it with a scintillometer to characterize the atmosphere during each measurement.</p> <h2 id="key-contributions">Key Contributions</h2> <ul> <li>Compared a Gaussian beam with OAM beams carrying topological charges of 1, 6, and 8</li> <li>Measured beam scintillation across a real near-maritime link under varied atmospheric conditions</li> <li>Observed a weak reduction in scintillation index as topological charge increased</li> <li>Identified the additional measurement scale needed to improve statistical significance</li> </ul> <h2 id="link-to-work">Link to Work</h2> <ul> <li><a href="https://doi.org/10.1016/j.optcom.2019.124836">DOI</a></li> </ul> <h2 id="related-work">Related Work</h2> <p>This publication is from the <a href="https://joewiedemann.info/research/oam-scintillation/">Scintillation of Laser Beams Carrying Orbital Angular Momentum</a> project.</p>https://joewiedemann.info/research/oam-scintillation/Mon, 10 Feb 2020 00:00:00 +0000https://joewiedemann.info/research/oam-scintillation/<h2 id="project-summary">Project Summary</h2> <p>This research project investigated whether imparting Orbital Angular Momentum (OAM) onto Gaussian mode laser beams improves their intensity stability when propagating through atmospheric turbulence. The work was conducted in a near-maritime environment, requiring the construction of a long-range optical link.</p> <h2 id="research-objectives">Research Objectives</h2> <p>The primary goal was to determine if OAM-carrying beams exhibit improved resistance to scintillation effects compared to standard Gaussian beams when propagating through turbulent atmospheric conditions.</p>