Epitaxial Growth of Single Crystal YAG for Optical Devices

Coatings

Joseph Kolis¹  Bradley Stadelman¹  SyedB. Qadri²  SyedN. Qadri²  Shyam Bayya²  Brandon Shaw²  Woohong Kim²  Jasbinder Sanghera² 

[1] Department of Chemistry, Clemson University, Clemson, SC 29634, USA;Naval Research Laboratory, Washington, DC 20375, USA;

关键词: liquid phase epitaxial growth;    hydrothermal growth;    fiber lasers;    YAG;    sesquioxides;   

DOI  :  10.3390/coatings11060644

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown