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Investigation on transparent Nd:YAG ceramic/YAG crystal composite by pressureless thermal diffusion bonding

Materials Letters, ISSN: 0167-577X, Vol: 320, Page: 132327
2022
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Transparent Nd:YAG ceramic/YAG crystal composites with well-defined bonding interface are successfully fabricated by pressureless direct thermal diffusion bonding at 1650–1725 ℃ in a vacuum furnace. The composites show high absorption capability at pumping wavelength of 808 nm and superior transmittance at lasing wavelength of 1064 nm, promising for high efficiency laser operation. The lattice diffusion coefficients (in m 2 /s) around the interface are calculated to be 10 -18  ∼ 10 -16 magnitude for Nd 3+, Si 4+, and Mg 2+ cations by Fick’s diffusion law, and activation energy for lattice diffusion are evaluated with Arrhenius fit.

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