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- Title
Epitaxial Growth of Single Crystal YAG for Optical Devices.
- Authors
Qadri, Syed N.; Kim, Woohong; Bayya, Shyam; Shaw, L. Brandon; Qadri, Syed B.; Kolis, Joseph; Stadelman, Bradley; Sanghera, Jasbinder
- Abstract
We report the latest progress on fabrication of rare earth doped single crystal yttrium aluminum garnet (YAG) core/undoped YAG cladded fibers. Rare-earth doped single crystal core fibers were grown with laser heated pedestal growth methods. In a second step, epitaxial methods were used to grow a single crystalline undoped YAG cladding onto the core fiber. Hydrothermal and liquid phase epitaxy methods utilize the core doped fiber as the seed. X-ray diffraction of cladding reveals an equilibrium (110) morphology. Energy-dispersive X-ray spectroscopy analysis shows there is minimal diffusion of rare-earth dopants into the cladding structure. The use of scandium doping is shown to substitute at the Al3+ site, thereby allowing an additional tunability of refractive index of core structure material besides conventional Y3+ site dopants. The use of these epitaxial growth methods enables material compatibility, tuning of refractive index, and conformal growth of cladding structures onto core fibers for optical devices.
- Subjects
OPTICAL devices; CRYSTAL whiskers; CRYSTAL growth; SINGLE crystals; LIQUID phase epitaxy; METAL cladding; EPITAXY; FIBER lasers
- Publication
Coatings (2079-6412), 2021, Vol 11, Issue 6, p644
- ISSN
2079-6412
- Publication type
Article
- DOI
10.3390/coatings11060644