Comparison of Glass Material and Laser Excitation Regime for UpconversionâBased 3D Volumetric Display
Date
2025
Authors
Wei, Y.
de Prinse, T.
Pan, X.
Schartner, E.P.
Tansu, N.
Elgammal, R.
Kappers, M.
Spooner, N.A.
EbendorffâHeidepriem, H.
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Advisors
Journal Title
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Type:
Journal article
Citation
Advanced Photonics Research, 2025; 6(11):2500158-1-2500158-8
Statement of Responsibility
Yunle Wei, Thomas de Prinse, Xuanzhao Pan, Erik P. Schartner, Nelson Tansu, Ramez Elgammal, Matthew Kappers, Nigel A. Spooner, Heike Ebendorff-Heidepriem
Conference Name
Abstract
Two-step, two-frequency (TSTF) upconversion in rare-earth-ion (REI) doped solids is a proven strategy for achieving 3D volumetric displays, with potential applications in defence, healthcare, education, manufacturing, and entertainment. Early studies have primarily focused on REI-doped fluoride glasses or single crystals, which efficiently support TSTF upconversion due to their low-phonon energy. However, these materials are challenging to produce at the size and quality required for commercial applications. This study explores tellurite and germanate glasses as scalable, low-phonon-energy alternatives by benchmarking their TSTF upconversion performance against fluoride glass for ErÂłâş green fluorescence. Tellurite and germanate glasses exhibit dimmer green upconversion under continuous-wave excitation, while tellurite glass unexpectedly outperforms fluoride glass when both lasers are pulsed with properly adjusted modulation parameters. Rate equation-based simulations are used to explain these findings. In particular, tellurite glass exhibits brighter emission than fluoride glass under synchronized dual-pulsed excitation due to its much higher ground- and excited-state absorption cross sections and radiative decay rate, which compensate for its shorter â´Sâ/â lifetime. Green voxel generation is demonstrated in a large â4âĂâ4âĂâ4âcmÂł ErÂłâş-doped tellurite glass cube with high optical quality. These results open new directions for REI-doped glass development and laser design for TSTF upconversion-based 3D volumetric displays.
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Dissertation Note
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Š 2025 The Author(s). Advanced Photonics Research published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.