Materials for Infrared Windows and Domes: Properties and Performance

Harris, Daniel C.

doi:10.1117/3.349896

Cited by 284 publications

(311 citation statements)

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“…Most of the optical ceramic activity had been focused at producing transparent window material with superior thermo-mechanical properties for applications at infrared wavelengths [12]. In recent years, we have made significant progress in producing ceramic laser materials.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in the Development of Neodymium-Doped Ceramic Yttria

Prasad

Edwards

Trivedi

et al. 2007

IEEE J. Select. Topics Quantum Electron.

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Solid-state lasers play a significant role in providing the technology necessary for active remote sensing of the atmosphere. Neodymium doped yttria (Nd:Y 2 O 3 ) is considered to be an attractive material due to its possible lasing wavelengths of ~914 nm and ~946 nm for ozone profiling. These wavelengths when frequency tripled can generate UV light at ~305 nm and ~315 nm, which is particularly useful for ozone sensing using differential absorption lidar technique. For practical realization of space based UV transmitter technology, ceramic Nd:Y 2 O 3 material is considered to possess great potential. A plasma melting and quenching method has been developed to produce Nd 3+ doped powders for consolidation into Nd:Y 2 O 3 ceramic laser materials. This far-from-equilibrium processing methodology allows higher levels of rare earth doping than can be achieved by equilibrium methods. The method comprises of two main steps: (a) plasma melting and quenching to generate dense, and homogeneous doped metastable powders, (b) pressure assisted consolidation of these powders by hot isostatic pressing to make dense nanocomposite ceramics. Using this process, several 1" x 1" ceramic cylinders have been produced. The infrared transmission of undoped Y 2 O 3 ceramics was as high as ~75% without anti-reflection coating. In the case of Nd:Y 2 O 3 ceramics infrared transmission values of ~50% were achieved. Furthermore, Nd:Y 2 O 3 samples with dopant concentrations of up to ~2 at. % were prepared without significant emission quenching.

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Section: Introductionmentioning

confidence: 99%

Recent Progress in the Development of Neodymium-Doped Ceramic Yttria

Prasad

Edwards

Trivedi

et al. 2007

IEEE J. Select. Topics Quantum Electron.

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“…These, so called Griffith's flaws 1,2 , may take the form of scratches, abrasions, or near surface fractures such as SSD. For this reason, one typically finds that the single biggest variable governing the mechanical strength of optical ceramics is the surface finish 3 .…”

Section: Introductionmentioning

confidence: 99%

The distribution of subsurface damage in fused silica

et al. 2005

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“…One such example is titaniabased tungsten AR composite coatings with photo electrochromic efficiency [162] . The research on thermochromic AR coatings also open another direction, in optoelectronics field such as VO 2 thin film smart coatings can be used in space craft sun shields, stationary optical shutters, optical switches, thermos optical modulators due to phase transition characteristics of vanadium oxide [163] . The first generation conventional single and bilayer AR coatings are still appropriate in laser applications but limited in various optical elements due to reflectance minima at smaller wavelength region and AOI dependency.…”

Section: Conclusion and Future Perspectivementioning

confidence: 99%

A Mini Review: Antireflective Coatings Processing Techniques, Applications and Future Perspective

Khan¹,

Wu²,

Pan³

et al. 2017

Res. Rev. J Mat. Sci

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Antireflective coatings (AR) are widely applied to eliminate the unwanted surface reflections from the AR coated substrate. In different optoelectronic devices, AR coatings have potential usage in photovoltaic solar cells, sensors, display devices, automobile industries to reduce reflectance, glare and enhance light transmittance. Natural phenomenon inspires researchers, and they generate bionic AR coatings copying the nature such as moth eyes, or cicada wings to fabricate efficient light harvesting AR coatings. In the current review article, we analyse and evaluate critically the progress and recent development in the fabrication of AR thin films comprising organic coatings, inorganic coatings, polymer AR coatings and bionic AR coatings. We predominantly emphasise the AR coatings fabrication by different methods and pinpoints the technological challenges in their real-world reliability. Finally, we address the future challenges and potential strategies for their upcoming prospect.

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Materials for Infrared Windows and Domes: Properties and Performance

Cited by 284 publications

References 0 publications

Recent Progress in the Development of Neodymium-Doped Ceramic Yttria

Recent Progress in the Development of Neodymium-Doped Ceramic Yttria

The distribution of subsurface damage in fused silica

A Mini Review: Antireflective Coatings Processing Techniques, Applications and Future Perspective

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