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Meeting Materials Science & Technology 2015
Symposium Ceramic Optical Materials
Presentation Title Low Absorption Spinel Windows for High Energy Lasers
Author(s) Guillermo R Villalobos, Woohong Kim, Colin Baker, Shyam Bayya, Michael Hunt, Bryan Sadowski, Ishwar Aggarwal, Jasbinder Sanghera
On-Site Speaker (Planned) Guillermo R Villalobos
Abstract Scope Ideal exit aperture windows for high-energy laser (HEL) should possess low absorption and be environmentally rugged and strong in order to protect the laser assembly without compromising the light propagating through the window. A trace amount of chemical impurity present in the window can result in local heating due to absorption of laser energy, which in turn, results in beam distortion and even catastrophic failure. The conventional window material such as fused silica glass does not satisfy HEL systems requirement to operate in harsh environmental conditions. Transparent magnesium aluminate spinel (MgAl2O4) ceramic, due to its excellent mechanical properties and wide IR transmission, has been considered as an ideal rugged window material for HEL systems. Transparent spinel ceramic windows fabricated using commercial powders often show high absorption. We report on 3 economically viable powder purification methods to lower the absorption loss spinel ceramic by 3 orders of magnitude.
Proceedings Inclusion? Planned: MS&T all conference proceedings CD


Cladded Single Crystal Fibers
Creation of New Material Science on Optical Ceramics
Effects of Varied Heat Treatments on Precipitation of Alumina in Astoichiometric Magnesium Aluminate Spinel
Fabrication of Transparent Magnesium Aluminate Spinel Ceramics using Two Kinds of Spinel Powder with Different Particle Sizes
Fundamental Study in the Processing of Transparent Ceramics
Highly Transparent Polycrystalline YAG Ceramics for Optical Applications
Laser Oscillation of Lu-based Oxide Ceramics by Spark Plasma Sintering
Low Absorption Spinel Windows for High Energy Lasers
NMR Spectroscopy of Paramagnetic Doped Ceramics to Determine Site Occupancy and Distribution
Novel Glass and Glass Ceramic Scintillators for Gamma-ray and Neutron Detection
Polycrystalline Transparent Yttrium Aluminum Garnet for Optical Applications
Praseodymium-doped SiAlON Red Phosphors Prepared by Polymer-derived Method
Processes and Characterizations of Ceramic Optical Fibers
Spark Plasma Sintering of Transparent Ceramics and Unusual Grain Growth
Synthesis and Processing of Transparent Ceramic Scintillators for Nuclear Radiation Detection
The Role of Scattering and Absorption on the Optical Properties of Birefringent Polycrystalline Ceramics: Modeling and Experiments
Transparent Ceramic Scintillators
Transparent Magnesium Aluminate Spinel Prepared via Microfluidization and Aqueous Slip-casting
Transparent Spinel by Microwave Sintering

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