We report the latest progress on fabrication of rare earth doped single crystal yttrium aluminum garnet (YAG) core/undoped YAG cladded fibers. Rare-earth core fibers were grown with laser heated pedestal growth methods. In a second step, epitaxial methods used to grow crystalline undoped cladding onto fiber. Hydrothermal and liquid phase epitaxy utilize fiber as seed. X-ray diffraction reveals ...