rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Polarization independent optical switches using an off diagonal electrooptic coefficient in lithium tantalate
  name:
    name part: Yoon, Dae Won
    name part: 1949-
    role:
      role term: creator
  name:
    name part: Eknoyan, Ohannes
    role:
      role term: degree supervisor.
  name:
    name part: Fry, Edward S.
    role:
      role term: degree committee member.
  name:
    name part: Parker, Donald L.
    role:
      role term: degree committee member.
  name:
    name part: Taylor, Henry F.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1988
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 102 leaves : illustrations ; 29 cm
  abstract: Polarization independent optical coupled waveguide switches have been produced in lithium tantalate using the recently developed zinc vapor diffusion technique. Diffusion and fabrication process are described in detail. Optical planar waveguides fabricated by this method in X, Y, and Z-cut LiTaO3 are characterized and compared in terms of their respective effective guide depth, effective refractive index change, and surface index change. Directional couplers of various dimensions produced in X-cut LiTaO3 are described and, their coupling coefficient and transfer length values are presented for both TE and TM input polarizations. The coupling coefficients are found to decrease exponentially as the guide separation is increased. It is shown that in spite of polarization dependent differences in the effective guide refractive indexes, directional couplers for which l[TM] = l[TE] are possible to fabricate. The optical characteristics of polarization independent coupled switches made in X-LiTaO3 are discussed. A switch having 0.39 cm electrooptic interaction length showed V[π] = 70.5 volts with switching efficiencies of 91% and 87% for the TM and TE polarizations respectively. Values for the optical/electrical fields overlap factor ranging between 0.04-0.06 were estimated in the tested devices.
  note: "Major subject: Electrical Engineering."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1988
  note: Includes bibliographical references.
  subject:
    topic: Integrated optics
  subject:
    topic: Optical wave guides
  subject:
    topic: Optoelectronic devices
  subject:
    topic: Major electrical engineering
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-1016863
  identifier: http://gateway.proquest.com/openurl
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-1016863
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 900618
    record change date: 20220103134827.0
    record identifier: in00000896467
    language of cataloging:
      language term: eng