About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Solid-state Optical Materials and Luminescence Properties
|
Presentation Title |
Ceramic Processes for LHPG (Laser Heated Pedestal Growth) |
Author(s) |
Hyunjun Kim, Randall Hay, Kent Averett, Andrew Schlup, John Drazin, Benjamin Gray, Randall Corns, Robert Turner, Cynthia Bowers |
On-Site Speaker (Planned) |
Hyunjun Kim |
Abstract Scope |
LHPG method has been used to grow high optical quality single crystal fibers for laser and sensing applications. Pressed ceramic powder and single crystal rods have been used as feedstocks for LHPG. LHPG using powder compacts introduces bubbles in the fibers; while single crystal feedstocks are limited in their availability, size, and customization. We developed fabrication processes for polycrystalline feedstocks that do not generate bubbles and are more affordable than single crystal feedstocks. Processes for polycrystalline cladding on the LHPG fibers are under development. Co-extrusion is used to put green cladding on the LHPG fibers. After co-extrusion, two approaches are under investigation, 1) cladding by melting of the green cladding of low melting point garnets and 2) sintering of green cladding on the core fibers. Methods to minimize the drying and sintering shrinkage that causes cladding cracks are described. Current status of the ceramic processes for LHPG will be discussed. |