3D printing of chalcogenide glasses: an original way for the elaboration of microstructured preforms and optical fibers (Conference Presentation)

Troles, Johann; Carcreff, Julie; Cheviré, François; Galdo, Elodie; Lebullenger, Ronan; Gautier, Antoine; Adam, Jean-Luc; Brilland, Laurent; Renversez, Gilles

doi:10.1117/12.2542284

Cited by 1 publication

(1 citation statement)

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“…3D printing methods open the way for optical devices based on chalcogenide glasses. 17 Based on this idea, the artificial stacking and sintering of ChGs powders with different refractive indices into blocks is also a very reliable technique for the preparation of refractive index custom GRIN. Both the linearity and magnitude of the refractive index change can be controlled by varying the composition and thickness of the powder layer.…”

Section: Introductionmentioning

confidence: 99%

Customized linear refractive index GRIN prepared by rapid sintering of multilayer chalcogenide glass powders

Zheng,

Xia,

Jia

et al. 2024

J Am Ceram Soc.

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Gradient refractive index (GRIN) lenses have recently become a hot topic in compact imaging and achromaticity. Current research focuses on exploiting GRIN materials and upgrading the preparation technology. In this study, infrared (IR) GRIN materials were successfully prepared by spark plasma sintering of multilayer chalcogenide glass (ChGs) powders. ChGs powders were derived from the Ge20Se80‐xTex series glasses (x = 0–28 mol%) with a maximum refractive index difference (Δn) of 0.25. The similar glass transition temperatures (ΔTg < 10°C) promote efficient sintering of multilayer powders. Six‐, eight‐, and ten‐layer powders of different compositions were rapidly sintered with a thickness of 600, 300, and 200 µm per layer, respectively. Such tiny layer thickness enables the GRIN materials to exhibit nearly linear refractive index variation. Energy dispersive spectroscopy line scans well characterized the gradient variation of GRIN. The maximum deviation of the refractive index gradient from the fitted target line was only ± 0.016 for the 10‐layer GRIN. The sintered GRIN shows excellent IR transparency, which is of great interest for mid‐wave and long‐wave infrared imaging.

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Section: Introductionmentioning

confidence: 99%