Title page for etd-0807112-062150


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URN etd-0807112-062150
Author Yingwei Chen
Author's Email Address No Public.
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Department Materials and Optoelectronic Science
Year 2011
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Study on the Growth and Optical Properties of Large-Sized Highly-Doped Nd:YAG Crystal by Czochralski Technique
Date of Defense 2012-06-13
Page Count 78
Keyword
  • Laser crystal
  • Nd:YAG
  • Solid state laser
  • Single crystal growth
  • Czochralski method
  • Abstract   This paper mainly focuses on the discussion about how to grow a large-sized highly-doped laser crystal- Neodymium yttrium aluminum garnet( {NdxY1-x}3Al5O3; Nd:YAG). The higher concentration of Nd:YAG crystal can allow the better efficiency of the laser. Since the ion size doped with Nd3+ ( R= 1.12A ) is larger than the ion size of Y3+ (R= 1.01A ), in the lattice of YAG, it’s not easy to mix the smaller Y3+ site with the larger diameter of the Nd3 + ion. Therefore, the higher concentration of the laser crystal we want to grow, the more difficult work it is.
      This experiment works under the use of the Czochralski technique to grow the laser crystal: Nd:YAG, and explore the impacts of different crystal pulling growth conditions on the growth of Nd:YAG crystal. Through adjusting the parameters of crystal growth, the crystal growth environments and the thermal fields, I discuss how to solve the problems of the scattering, cracking and spiral growing during the crystal growth process in order to improve the quality of the crystals.
      Finally, comparing the results of a variety of spectral analysis (X-ray diffraction, UV / Vis Spectroscopy, Raman Spectroscopy, PL Spectroscopy) on the slice samples of Nd:YAG crystal which grew by our laboratory with the literature results, we can find that the X-ray diffraction pattern, the absorption spectroscopy, the Raman spectroscopy and the Photoluminescence spectroscopy of the Nd:YAG crystals grew in this experiment are consistent with the literature.
    Advisory Committee
  • Da-ren Hang - chair
  • Chao-kuei Lee - co-chair
  • Shr-li Yang - co-chair
  • Mitch Chou - advisor
  • Files
  • etd-0807112-062150.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2012-08-07

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