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      Optical Characterization of Rare Earth Doped Glasses

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      GokulakrishnanSoundararajan.pdf (2.390Mb)
      Date
      2009
      Author
      Soundararajan, Gokulakrishnan
      Type
      Thesis
      Degree Level
      Masters
      Metadata
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      Abstract
      Optical amplifiers are highly sought-after in optical communications to power boost light signals carrying information. Rare Earth doped glasses have been the medium of choice for optical amplification. It is, therefore, essential to understand the interaction of light with potential host glasses for rare-earths before they could be proposed as suitable candidates. In this research, we have optically characterized three different rare earth doped bulk glasses. The glass samples investigated were Neodymium doped Gallium Lanthanum Sulfide (GLS:Nd), Erbium doped Germanium Gallium Sulfide (GeGaS:Er) and Erbium doped Fluorochlorozirconate (FCZ:Er). The transmission spectra, T(λ), was used in identifying the absorption transitions of rare earth ions from the ground level to the various excited levels and in obtaining the optical absorption coefficient, α(λ). This in turn was used in determining the Judd-Ofelt parameters, which were then used in obtaining radiative lifetimes of the energy levels of interest. Photoluminescence emission bands were also identified and their shapes were investigated. Finally, a comparison of the Judd-Ofelt lifetime with the experimental decay time was also done. From which, the major decay mechanism of the rare earth ions from the energy level under investigation was concluded.
      Degree
      Master of Science (M.Sc.)
      Department
      Electrical Engineering
      Program
      Electrical Engineering
      Supervisor
      Kasap, Safa
      Committee
      Dinh, Ann; Bourassa, Adam; Johanson, Robert
      Copyright Date
      2009
      URI
      http://hdl.handle.net/10388/etd-07292009-064945
      Subject
      Photoluminescence
      Emission
      Chalcogenide Glasses
      Absorption
      Erbium
      Neodymium
      Fluorochlorozirconate Glass
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