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Creators/Authors contains: "Barker, Collin"

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  1. ; ; ; ; ; ; ; ; (, International Journal of Applied Glass Science)
    Abstract This work demonstrates the capability to crystallize YAG via femtosecond pulsed laser. Challenges in using melt‐quench glass are shown to restrict glass composition and have not yielded YAG via femtosecond laser crystallization. An alternative glass‐making technique was used to fabricate a range of compositions not otherwise possible. Glasses of YAG with added silica in the range of 0–20 mol% were tested under the laser to explore the allowable deviation from stoichiometric YAG. Raman spectroscopy and Electron backscatter diffraction indicated successful fabrication of YAG, and usage of combined excitation emission spectroscopy (CEES) allowed probing of erbium doped compositions. 
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    Free, publicly-accessible full text available May 28, 2026
  2. ; ; (, Optical Materials)
    Erbium doped single crystals of lithium niobate were grown within the bulk of 0.075 Er2O3 – 37 Li2O – 37 Nb2O5 – 26 SiO2 glass using a femtosecond pulsed laser. Combined excitation emission spectroscopy was used to show incorporation of erbium into the laser written crystal lattice. Laser power and scanning speed were held constant at optimized values, while bulk sample temperature was systematically varied to study the impact on the crystal growth. Using electron backscatter diffraction to study the transverse cross-sections of grown crystals, control over the lattice rotation rates and crystal size were realized. Unlike changing other parameters, a range of temperatures were found to have substantial impacts on crystal growth, without inhibiting the ability to maintain single crystal formation over long distances. 
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  3. ; ; ; ; ; ; ; (, Optical Materials)
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