{"id":{"repo_id":"ohiolink","oai_identifier":"oai:etd.ohiolink.edu:dayton1355513250"},"canonical_url":"https://search.dev.ndltd.org/etd/ohiolink/oai:etd.ohiolink.edu:dayton1355513250","repository":{"repo_id":"ohiolink","name":"OhioLINK","base_url":"https://etd.ohiolink.edu/acprod/odb_etd/ws/oai/oai"},"display":{"title":"Propagation of Gaussian Beams Through a Modified von Karman Phase Screen","abstract":"Gaussian beam propagation through discrete phase screens and an extended random media has been studied extensively over the last four decades. In this thesis, we numerically examine the effects of a discrete phase screen during Gaussian beam propagation on the scintillation index for a single beam and on the fringe visibility for the two transversely separated beams. We use the modified von Karman spectrum model to describe the phase screen statistics, utilizing the Fried parameter, inner scale and the outer scale. The scintillation index is analyzed as a function of the structure constant, phase screen location, the initial width of the Gaussian beam, etc. Similarly, the numerical simulations are extended using a pair of transversely separated Gaussian beams. We examine the interference of the beams and measure the fringe visibility at the target. We then correlate the scintillation index and the fringe visibility results and suggest the possible applications.","abstract_html":"Gaussian beam propagation through discrete phase screens and an extended random media has been studied extensively over the last four decades. In this thesis, we numerically examine the effects of a discrete phase screen during Gaussian beam propagation on the scintillation index for a single beam and on the fringe visibility for the two transversely separated beams. We use the modified von Karman spectrum model to describe the phase screen statistics, utilizing the Fried parameter, inner scale and the outer scale. The scintillation index is analyzed as a function of the structure constant, phase screen location, the initial width of the Gaussian beam, etc. Similarly, the numerical simulations are extended using a pair of transversely separated Gaussian beams. We examine the interference of the beams and measure the fringe visibility at the target. We then correlate the scintillation index and the fringe visibility results and suggest the possible applications.","abstract_has_math":false,"creators":["Whitfield, Erica Marie"],"institution":"University of Dayton","degree_name":"Master of Science (M.S.)","degree_level":"masters","degree_discipline":"Electro-Optics","degree_department":null,"school":null,"contributors":["Banerjee, Partha P."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012","date_published":"2012","updated_at":"2026-07-24T03:35:52Z","subjects":["Optics","Modified Von Karman","Phase Screen","Gaussian Beam Propagation","Fringe Visibility","Scintillation Index"],"languages":["English"],"rights":["unrestricted","This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://rave.ohiolink.edu/etdc/view?acc_num=dayton1355513250","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Banerjee, Partha P."]},{"key":"dc:creator","label":"Author","values":["Whitfield, Erica Marie"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012"]},{"key":"dc:publisher","label":"Institution","values":["University of Dayton / OhioLINK"]},{"key":"dc:type","label":"Dc Type","values":["Electronic Thesis or Dissertation"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electro-Optics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (M.S.)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Dayton"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Optics","Modified Von Karman","Phase Screen","Gaussian Beam Propagation","Fringe Visibility","Scintillation Index"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["unrestricted","This thesis or dissertation is protected by copyright: all rights reserved. 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The scintillation index is analyzed as a function of the structure constant, phase screen location, the initial width of the Gaussian beam, etc. Similarly, the numerical simulations are extended using a pair of transversely separated Gaussian beams. We examine the interference of the beams and measure the fringe visibility at the target. We then correlate the scintillation index and the fringe visibility results and suggest the possible applications."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf","p.67","637.2 KB"]},{"key":"dc:title","label":"Title","values":["Propagation of Gaussian Beams Through a Modified von Karman Phase Screen"]}]}],"canonical_facts":{"dc:contributor":["Banerjee, Partha P."],"dc:creator":["Whitfield, Erica Marie"],"dc:date":["2012"],"dc:description":["Gaussian beam propagation through discrete phase screens and an extended random media has been studied extensively over the last four decades. In this thesis, we numerically examine the effects of a discrete phase screen during Gaussian beam propagation on the scintillation index for a single beam and on the fringe visibility for the two transversely separated beams. We use the modified von Karman spectrum model to describe the phase screen statistics, utilizing the Fried parameter, inner scale and the outer scale. The scintillation index is analyzed as a function of the structure constant, phase screen location, the initial width of the Gaussian beam, etc. Similarly, the numerical simulations are extended using a pair of transversely separated Gaussian beams. We examine the interference of the beams and measure the fringe visibility at the target. 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It may not be copied or redistributed beyond the terms of applicable copyright laws."],"dc:subject":["Optics","Modified Von Karman","Phase Screen","Gaussian Beam Propagation","Fringe Visibility","Scintillation Index"],"dc:title":["Propagation of Gaussian Beams Through a Modified von Karman Phase Screen"],"dc:type":["Electronic Thesis or Dissertation"],"thesis:degree_discipline":["Electro-Optics"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science (M.S.)"],"thesis:institution_name":["University of Dayton"]},"updated_at":"2026-07-24T03:35:52Z"}