Title page for etd-0729118-101013


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URN etd-0729118-101013
Author Chao-Wei Liu
Author's Email Address No Public.
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Department Electro-Optical Engineering
Year 2017
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title The Role of Dispersive Wave in Supercontinuum Generation : Using Tantalum Pentoxide Waveguide
Date of Defense 2018-07-28
Page Count 82
Keyword
  • Dispersive wave generation
  • Supercontinuum generation
  • Waveguide
  • Nonlinear dispersion
  • Tantalum pentoxide(Ta2O5)
  • Abstract In last few years, super continuum generation (SCG) of which the spanning spectrum is believed to depend on the location of dispersive wave (DW) has been attracted plenty of attention due to it wide application, such as optical coherence tomography (OCT)and wavelength division multiplexing (WDM). In this thesis, using the nature of high optical nonlinearity of Ta2O5, the role of dispersive wave was investigated. In the first part, clear power dependent wavelength of DW and SCG of 1.37 octave was observed and studied for not only TE also TM mode of anomalous dispersion Ta2O5 waveguide. For example, the central wavelength of the generated DW from TE excitation was blue-shifted from 611nm to 602nm with excitation peak power increasing from 198W to 396W. This blue-shift behavior of DW wavelength as increasing excitation power during SCG is attribute to the contribution of inevitable nonlinear dispersion resulting from higher nonlinear coefficient of Ta2O5.The phase matching analysis can be applied and location of DW can be accordingly and semi-quantitatively predicted. In the second part, the possibility of SCG from normal dispersion Ta2O5 waveguide was investigated by using nonlinear dispersion for providing phase matching condition. For waveguide with dimension of 2100X700, clear SCG of 1.22 octave spanning and green(560nm) dispersive wave were observed. This is first time to our best knowledge that SCG can be obtained from waveguide with normal dispersion. Additionally, power dependent and dimension dependent SCG were discussed for confirming the role of DW.
    Advisory Committee
  • Yi-Jen Chiu - chair
  • Chung-Lun Wu - co-chair
  • Min-Hsiung Shih - co-chair
  • Yuan-Yao Lin - co-chair
  • Chao-Kuei Lee - advisor
  • Files
  • etd-0729118-101013.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2018-08-29

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