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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.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advanced Spinel Ceramics with Highest VUV-vis Transparency
Application of La2Zr2O7:Pr3+ Nanoparticles for Luminescence Thermometry
Beta-SiC for High Strength Windows
Ceramic Faraday Rotator for Laser Machining
Ceramic Processes for LHPG (Laser Heated Pedestal Growth)
Crystallization from Glass: Application to Transparent (Glass-)Ceramics
D-25: Crystallite Growth of Eu-doped Lanthanum Zirconate Pyrochlores Investigated via XRD Line Broadening
Development of Novel Garnet-based Transparent Ceramics for the High Power White Lighting
Development of Sc2Mo3O12:Eu3+ as a Red Phosphor with Superior Thermally Enhanced Emission
Electroluminescence During Flash Experiments Interpreted as a Solid State Plasma
Fabrication and Properties of Y2O3 Based Ceramics
High-entropy Rare-earth Aluminates: Crystal Growth and Ceramics
Investigation of Micro/Nano Mechanical Behavior of AlON Transparent Ceramics
Laser Processing of Glass, Using the Memory of Glass to Characterize the Local Modifications
Manipulable Persistent Luminescence of Pr3+-Activated Phosphors
Melt Processing of a Co-extruded LiCa2Mg2V3O12 Garnet onto a YAG Single Crystal for IR Laser Applications
Non-equilibrium Synthesis of New Oxide Materials with Modified Optical Properties
Optical Ceramic Window Materials at NRL
Polycrystalline Ceramics for Lasers: Current Potential and Limits
Reusable Multilayer Photonic Nanostructured Coatings for Optical Limiting of High Energy Lasers
Structural and Optical Properties of the Spin-coated YAG and Nd:YAG Epitaxial Films
Ultrafast High Temperature Sintering for Ceramic Membranes
Upconverting Er3+-doped Ytterbium-aluminum Garnet Ceramics
UVC and UVB Dual-band Persistent Luminescent Phosphor
Yb Doped MgO Transparent Ceramics Sintered through the SPS Method

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