SWaP reduction regimes in achromatic GRIN singlets

Campbell, Sawyer D.; Brocker, Donovan E.; Nagar, Jogender; Werner, Douglas H.

doi:10.1364/ao.55.003594

Cited by 20 publications

(9 citation statements)

References 8 publications

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“…The group's ReTort tool was initially developed to support efforts in transformation optics and design strategies to reduce SWaP 114,115 and has since been extended to treat other types of applications including metamaterials. Early work showed how methods could be used for color and aberration correction design 116,117 along with multifrequency wavefront matching. 118 In Ref.…”

Section: Optical Design Tools For Grinmentioning

confidence: 99%

Advances in infrared gradient refractive index (GRIN) materials: a review

et al. 2020

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Optical materials capable of advanced functionality in the infrared will enable optical designs that can offer lightweight or small footprint solutions in both planar and bulk optical systems. The University of Central Florida's Glass Processing and Characterization Laboratory, together with our collaborators, have been evaluating compositional design and processing protocols for both bulk and film strategies employing multicomponent chalcogenide glasses (ChGs). These materials can be processed with broad compositional flexibility that allows tailoring of their transmission window, physical and optical properties, which allows them to be engineered for compatibility with other homogeneous amorphous or crystalline optical components. We review progress in forming ChG-based gradient refractive index (GRIN) materials from diverse processing methodologies, including solution-derived ChG layers, poled ChGs with gradient compositional and surface reactivity behavior, nanocomposite bulk ChGs and glass ceramics, and metalens structures realized through multiphoton lithography. We discussed current design and metrology tools that lend critical information to material design efforts to realize next-generation IR GRIN media for bulk or film applications.

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Section: Optical Design Tools For Grinmentioning

confidence: 99%

Advances in infrared gradient refractive index (GRIN) materials: a review

et al. 2020

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“…However, the samples produced by stacking or controlled crystallization were axial GRINs, while radial GRINs are more desirable for optical design. [3] In this paper, we demonstrate the first fabrication of a radial GRIN for the IR using 80 GeSe 2 -20 Ga 2 Se 3 glass composition, by spatially resolved crystallization.…”

Section: Introductionmentioning

confidence: 97%

“…For example, the use of a specific index profile allows to correct efficiently thermal and chromatic aberrations with a significantly reduced number of lenses compared to a conventional system. [2,3] Such attractive prospects explain why GRIN materials are widely used in the visible. Many techniques have been employed for fabrication of GRIN in oxide glasses among which neutron irradiation, [4] chemical vapor deposition (CVD), [5] thermal poling, [6] sol-gel method [7] and ionic exchange.…”

Section: Introductionmentioning

confidence: 99%

Radial gradient refractive index (GRIN) infrared lens based on spatially resolved crystallization of chalcogenide glass

Lavanant¹,

Calvez²,

Cheviré³

et al. 2020

Opt. Mater. Express

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While widely used in the visible, radial gradient refractive index (GRIN) lenses are still elusive in the IR waveband. In this paper we introduce a new method based on spatially resolved crystallization of chalcogenide glass to produce such lenses. Optical and structural properties of 80 GeSe 2-20 Ga 2 Se 3 glass ceramic samples are measured. A shift of refractive index is induced by increasing the density of nanocrystals. By placing the sample into a tailored thermal profile, spatially controlled crystallization is achieved. To our knowledge this constitutes the first fabrication of an optically functional radial GRIN in the IR. We also introduce a method to characterize the index profile non-destructively, which is a necessary step for embedding GRIN into commercial systems. midwave and longwave infrared. This fabrication is achieved by using spatially controlled crystallization of chalcogenide glass in an annular furnace. A non-destructive way to characterize such lenses is also introduced.

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“…Another way to further reduce the cost of these systems without degrading their performance is to add optical functionality to the individual components through the creation of gradient refractive index (GRIN) profiles within the components. GRIN components offer the opportunity to reduce the size, weight, and/or number of optical elements needed in an optical system while still maintaining or improving the system's optical performance …”

Section: Introductionmentioning

confidence: 99%

Infrared Glass–Ceramics with Multidispersion and Gradient Refractive Index Attributes

Sisken

Kang

Veras

et al. 2019

Adv Funct Materials

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Infrared (IR) glass-ceramics (GCs) hold the potential to dramatically expand the range of optical material solutions available for use in bulk and planar optical systems in the IR. Current material solutions are limited to single-or polycrystalline materials and traditional IR-transparent optical glasses. GCs that can be processed with spatial control and extent of induced crystallization present the opportunity to realize an effective refractive index variation, enabling arbitrary gradient refractive index elements with tailored optical function. This work discusses the role of the parent glass composition and morphology on nanocrystal phase formation in a multicomponent chalcogenide glass. Through a two-step heat treatment protocol, a Ge-As-Pb-Se glass is converted to an optical nanocomposite where the type, volume fraction, and refractive index of the precipitated crystalline phase(s) define the resulting nanocomposite's optical properties. This modification results in a giant variation in infrared Abbe number, the magnitude of which can be tuned with control of crystal phase formation. The impact of these attributes on the GCs' refractive index, transmission, dispersion, and thermo-optic coefficient is discussed. A systematic protocol for engineering homogeneous or gradient changes in optical function is presented and validated through experimental demonstration employing this understanding.

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SWaP reduction regimes in achromatic GRIN singlets

Cited by 20 publications

References 8 publications

Advances in infrared gradient refractive index (GRIN) materials: a review

Advances in infrared gradient refractive index (GRIN) materials: a review

Radial gradient refractive index (GRIN) infrared lens based on spatially resolved crystallization of chalcogenide glass

Infrared Glass–Ceramics with Multidispersion and Gradient Refractive Index Attributes

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