Optically and rheologically tailored polymers for applications in integrated optics

Gleißner, Uwe; Khatri, Bilal; Megnin, Christof; Sherman, Stanislav; Xiao, Yanfen; Hofmann, Martin; Günther, Axel; Rahlves, Maik; Roth, Bernhard; Zappe, Hans; Hanemann, Thomas

doi:10.1016/j.sna.2016.02.029

Cited by 10 publications

(5 citation statements)

References 27 publications

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“…Previous work has shown that resins developed in our research group are compatible with the B9Creator and its illumination source [37]. Building up on this, experiments showed that a new base resin comprising BAEDA and EGDMA as comonomers, and in combination with TPO as a photoinitiator, had the best performance in terms of print quality with the B9Creator.…”

Section: Resin Development and Characterizationsupporting

confidence: 52%

Development of a Multi-Material Stereolithography 3D Printing Device

et al. 2020

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Additive manufacturing, or nowadays more popularly entitled as 3D printing, enables a fast realization of polymer, metal, ceramic or composite devices, which often cannot be fabricated with conventional methods. One critical issue for a continuation of this success story is the generation of multi-material devices. Whilst in fused filament fabrication or 3D InkJet printing, commercial solutions have been realized, in stereolithography only very few attempts have been seen. In this work, a comprehensive approach, covering the construction, material development, software control and multi-material printing is presented for the fabrication of structural details in the micrometer range. The work concludes with a critical evaluation and possible improvements.

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Section: Resin Development and Characterizationsupporting

confidence: 52%

Development of a Multi-Material Stereolithography 3D Printing Device

et al. 2020

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“…4 When the printed waveguide core has the highest refractive index in the system, more of the light emitted in the fluorescent layer travels into the waveguide core. More sophisticated coupling structures, such as reflectors, gratings, or scattering nanoparticles, especially at the interface between waveguide and foil, would be a further option, but negate the simplicity of the presented concept and cannot be created by printing techniques alone.…”

Section: Discussionmentioning

confidence: 99%

“…Current research efforts aim toward the realization of a complete optical sensor system consisting of light sources, optical waveguides, embedded sensor structures, and light detectors on a flexible substrate. The sensor structures, designed to react to external physical properties such as temperature, 2 humidity, 3,4 or elongation, 5 alter the passing light in the waveguide so that it is possible to quantify a change of the corresponding physical property. By using networks of these systems, a large area can be monitored entirely by optical means, completely without electrical components.…”

Section: Introductionmentioning

confidence: 99%

Ink-jet printed fluorescent materials as light sources for planar optical waveguides on polymer foils

Bollgruen

Gleißner

Wolfer³

et al. 2016

Opt. Eng

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Abstract. Polymer-based optical sensor networks on foils (planar optronic systems) are a promising research field, but it can be challenging to supply them with light. We present a solvent-free, ink-jet printable material system with optically active substances to create planar light sources for these networks. The ink is based on a UV-curable monomer, the fluorescent agents are EuðDBMÞ 3 Phen or 9,10-diphenylantracene, which fluoresce at 612 or 430 nm, respectively. We demonstrate the application as light source by printing a small area of fluorescent material on an optical waveguide fabricated by flexographic printing on PMMA foil, resulting in a simple polymer-optical device fabricated entirely by additive deposition techniques. When excited by a 405-nm laser of 10 mW, the emitted light couples into the waveguide and appears at the end of the waveguide. In comparison to conventional light sources, the intensity is weak but could be detected with a photodiode power sensor. In return, the concept has the advantage of being completely independent of any electrical elements or external cable connections.

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“…To solve this problem, a co-polymerisable solvent was used to tune the viscosity of the acrylate base resin (Syntholux, Synthopol). From several possible and available agents [26,27], Ethylene glycol dimethacrylate (EGDMA) was selected. By polymerising completely with the base resin, it enables a printable low viscosity material that does not require a post-bake step to evaporate any additives.…”

Section: Methodsmentioning

confidence: 99%

Ink-jet printed optical waveguides

Bollgruen

Wolfer²,

Gleißner

et al. 2017

Flex. Print. Electron.

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Optical waveguides were fabricated on flexible foil substrates by ink-jet printing, to complement and enhance printed flexible electronics with optical networks. The 145 μm wide and 20 μm high transparent polymer tracks were created by printing subsequent tracks of an acrylate ink on polymer foil. A printable, optically transparent material was prepared by a combination of an acrylate resin with a low-viscosity, co-polymerising acrylate. This solved the problem of solvent evaporation for substrates with low heat tolerance. Thermally induced pinning, used to prevent the ink from spreading out on the substrate was achieved by heating the substrate to 60 °C, and found to be strongly affected by the time lapse between deposition of the individual layers. This tool allowed to increase the aspect ratio of the printed tracks from 0.07 to 0.17, and the contact angle of the printed tracks from 15°to 37°. After completion of the deposition step, the waveguides were polymerised under UV light, and covered by a printed upper cladding layer. In the optical evaluation, transmission could be demonstrated with an attenuation in the range of 1.4 dB cm −1 for a wavelength of 785 nm, with a significant portion of material attenuation.

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Optically and rheologically tailored polymers for applications in integrated optics

Cited by 10 publications

References 27 publications

Development of a Multi-Material Stereolithography 3D Printing Device

Development of a Multi-Material Stereolithography 3D Printing Device

Ink-jet printed fluorescent materials as light sources for planar optical waveguides on polymer foils

Ink-jet printed optical waveguides

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