Transparent ceramic suits high-energy laser systems

Unlike fused silica and oxyfluoride glasses that cannot survive in some harsh environments, a new transparent ceramic for high-energy laser (HEL) systems developed at the US Naval Research Laboratory (NRL; Washington, DC) can withstand impact from rain droplets at 600 mph and sand particles at speeds up to 460 mph with no change in transmission parameters.

A new transparent ceramic survives under harsh environmental conditions with no change in transmission parameters

The transparent magnesium aluminate spinel (MgAl2O4) ceramic, developed as a window and dome material for protecting sensors operating from the UV to the mid-IR region to 5 µm, was designed with optimized low absorption loss of 6 ppm/cm to minimize the beam distortions and loss of output power that are measured as optical-path distortions in HEL systems. The ceramic spinel was made by hot-pressing ball-milled spinel powders at 1400–1650ºC for 2–4 hours using a uniform coating of a small amount of lithium fluoride sintering aid that was eliminated by evaporation prior to full densification. The NRL spinel powder (synthesized by an aqueous process) had crystallites 100–200 nm in size with excellent phase purity based on x-ray diffraction and chemical analysis, with an impurity content several orders of magnitude lower than commercially available spinel powders. Contact Jas Sanghera at jas.sanghera@nrl.navy.mil.

More Laser Focus World Current Issue Articles
More Laser Focus World Archives Issue Articles

Most Popular Articles

Webcasts

Ray Optics Simulations with COMSOL Multiphysics

The Ray Optics Module can be used to simulate electromagnetic wave propagation when the wavelength is much smaller than the smallest geometric entity in the ...
White Papers

Accurate LED Source Modeling Using TracePro

Modern optical modeling programs allow product design engineers to create, analyze, and optimize ...

All About Aspheric Lenses

The most notable benefit of aspheric lenses is their ability to correct for spherical aberration....

Wavelength stabilized multi-kW diode laser systems

Wavelength stabilization of high-power diode laser systems is an important means to increase the ...
Technical Digests

Fiber for Fiber Lasers

The development of higher-power and higher-energy fiber lasers has benefited from many advances i...

SCANNERS FOR MATERIALS PROCESSING: Serving demanding applications

Galvanometer-based scanners are an essential component in laser-based materials-processing system...

Click here to have your products listed in the Laser Focus World Buyers Guide.

PRESS RELEASES

Synopsys' CODE V Version 10.4 is now generally available

03/30/2012 Synopsys' CODE V Enhances Analysis of Precision Optical Systems.

Scratch-resistant mirror with gold surface

03/12/2012 In the LINOS catalog from Qioptiq you will now find the scratch-resistant mirror with gold surface.
Social Activity
  •  
  •  
  •  
  •  
Copyright © 2007-2015. PennWell Corporation, Tulsa, OK. All Rights Reserved.PRIVACY POLICY | TERMS AND CONDITIONS