scholarly journals Melt-Spun Photoluminescent Polymer Optical Fibers for Color-Tunable Textile Illumination

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1740
Author(s):  
Konrad Jakubowski ◽  
Manfred Heuberger ◽  
Rudolf Hufenus
Keyword(s):  
Energy Transfer ◽  
Optical Fibers ◽  
Color Space ◽  
Emission Spectra ◽  
Wide Range ◽  
Color Tunable ◽  
Melt Spun ◽  
Polymer Optical Fibers ◽  
Collective Emission ◽  
Down Conversion

The increasing interest in luminescent waveguides, applied as light concentrators, sensing elements, or decorative illuminating systems, is fostering efforts to further expand their functionality. Yarns and textiles based on a combination of distinct melt-spun polymer optical fibers (POFs), doped with individual luminescent dyes, can be beneficial for such applications since they enable easy tuning of the color of emitted light. Based on the energy transfer occurring between differently dyed filaments within a yarn or textile, the collective emission properties of such assemblies are adjustable over a wide range. The presented study demonstrates this effect using multicolor, meltspun, and photoluminescent POFs to measure their superimposed photoluminescent emission spectra. By varying the concentration of luminophores in yarn and fabric composition, the overall color of the resulting photoluminescent textiles can be tailored by the recapturing of light escaping from individual POFs. The ensuing color space is a mean to address the needs of specific applications, such as decorative elements and textile illumination by UV down-conversion.

scholarly journals Suspended-Core Microstructured Polymer Optical Fibers and Potential Applications in Sensing

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3449 ◽  
Author(s):  
Wanvisa Talataisong ◽  
Rand Ismaeel ◽  
Martynas Beresna ◽  
Gilberto Brambilla
Keyword(s):  
Optical Fibers ◽  
Material Selection ◽  
Biological Species ◽  
Single Step ◽  
3D Printer ◽  
Sensing Applications ◽  
Wide Range ◽  
Potential Applications ◽  
Pressure Chemical ◽  
Polymer Optical Fibers

The study of the fabrication, material selection, and properties of microstructured polymer optical fibers (MPOFs) has long attracted great interest. This ever-increasing interest is due to their wide range of applications, mainly in sensing, including temperature, pressure, chemical, and biological species. This manuscript reviews the manufacturing of MPOFs, including the most recent single-step process involving extrusion from a modified 3D printer. MPOFs sensing applications are then discussed, with a stress on the benefit of using polymers.

scholarly journals Luminescent solar concentrators based on melt-spun polymer optical fibers

2020 ◽  
Vol 189 ◽  
pp. 108518 ◽  
Author(s):  
Konrad Jakubowski ◽  
Chieh-Szu Huang ◽  
Ali Gooneie ◽  
Luciano F. Boesel ◽  
Manfred Heuberger ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators ◽  
Melt Spun ◽  
Polymer Optical Fibers

Tri-chromatic white-light emission from a single-phase Ca9Sc(PO4)7:Eu2+,Tb3+,Mn2+ phosphor for LED applications

2015 ◽  
Vol 44 (39) ◽  
pp. 17241-17250 ◽  
Author(s):  
Lihong Jiang ◽  
Ran Pang ◽  
Da Li ◽  
Wenzhi Sun ◽  
Yonglei Jia ◽  
...  
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Single Phase ◽  
Light Emission ◽  
White Light Emission ◽  
Transfer Processes ◽  
Wide Range ◽  
Color Tunable

A wide range color-tunable tri-chromatic Ca9Sc(PO4)7:Eu2+,Tb3+,Mn2+ w-LED phosphor was obtained based on the efficient Eu2+ to Tb3+ and Eu2+ to Mn2+ energy transfer processes.

Up/down conversion, tunable photoluminescence and energy transfer properties of NaLa(WO4)2:Er3+,Eu3+ phosphors

RSC Advances ◽  
2015 ◽  
Vol 5 (119) ◽  
pp. 97995-98003 ◽  
Author(s):  
Yan Liu ◽  
Yanxia Liu ◽  
Guixia Liu ◽  
Xiangting Dong ◽  
Jinxian Wang
Keyword(s):  
Energy Transfer ◽  
Hydrothermal Method ◽  
Single Component ◽  
Transfer Mechanism ◽  
Energy Transfer Mechanism ◽  
Color Tunable ◽  
One Step ◽  
Down Conversion ◽  
Transfer Properties

A series of novel, color-tunable, single-component NaLa(WO4)2:Er3+,Eu3+ phosphors were prepared by a one-step hydrothermal method. The energy transfer mechanism was studied, and color-tunable emissions in NaLa(WO4)2 are realized.

Optical Spectra of Chlorophyll a and b Molecules and Complexes in PMMA and MTHF

1978 ◽  
Vol 33 (10) ◽  
pp. 1197-1205
Author(s):  
W. Hägele ◽  
D. Schmid ◽  
F. Drissler ◽  
J. Nauš ◽  
H. C. Wolf
Keyword(s):  
Energy Transfer ◽  
Chlorophyll A ◽  
Fluorescence Spectra ◽  
Emission Spectra ◽  
Optical Spectra ◽  
Chlorophyll B ◽  
High Concentration ◽  
Transfer Processes ◽  
Wide Range ◽  
Chlorophyll A And B

AbstractThe optical spectra of chlorophyll a and chlorophyll b in PMMA and MTHF were studied over a wide range of concentration (8 X 10-6-1 X 10-3 mole/l in PMMA, and 10-6-10-1 mole/l in MTHF). In the absorption spectra it is possible to identify bands which originate from chlorophyll disolvates and chlorophyll monosolvates in MTHF as well as bands which are most probably due to isolated chlorophyll molecules in PMMA. In high-concentration samples of chlorophyll in MTHF some bands may be assigned to aggregates, but based on optical results only, no particular model can be proposed. The emission spectra are strongly influenced by reabsorption and energy transfer processes. However, the so-called Qy band of isolated molecules in PMMA and of chlorophyll monosolvates in MTHF as well as the Qx and the Qy bands of chlorophyll disolvates in MTHF can be identified unequivocally in the fluorescence spectra.

scholarly journals Exploration of the Temperature Sensing Ability of La2MgTiO6:Er3+ Double Perovskites Using Thermally Coupled and Uncoupled Energy Levels

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5557
Author(s):  
Thi Hong Quan Vu ◽  
Bartosz Bondzior ◽  
Dagmara Stefańska ◽  
Przemysław J. Dereń
Keyword(s):  
Energy Transfer ◽  
Energy Level ◽  
Critical Concentration ◽  
Energy Levels ◽  
Emission Spectra ◽  
Temperature Sensing ◽  
Double Perovskites ◽  
X Ray ◽  
Wide Range ◽  
Intense Luminescence

This work aimed to explore the temperature-sensing performance of La2MgTiO6:Er3+ double perovskites based on thermally coupled and uncoupled energy levels. Furthermore, the crystal structure, chemical composition, and morphology of the samples were investigated by powder X-ray diffraction, energy-dispersive X-ray spectroscopy, and scanning electron microscopy, respectively. The most intense luminescence was observed for the sample doped with 5% Er3+. The temperature-dependent emission spectra of La2MgTiO6:5% Er3+ were investigated in the wide range of 77–398 K. The highest sensitivity of the sample was equal to 2.98%/K corresponding to the thermally coupled energy level 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 as compared to 1.9%/K, obtained for the uncoupled energy level 2H11/2 → 4I15/2 and 2H9/2 → 4I15/2. Furthermore, the 300 K luminescent decay profiles were analyzed using the Inokuti–Hirayama model. The energy transfer among Er3+ ions was mainly regulated by the dipole–dipole mechanism. The critical transfer distance R0, critical concentration C0, energy transfer parameter Cda, and energy transfer probability Wda were 9.81 Å, 2.53×1020 ions·cm−3, 5.38×10−39 cm6·s−1, and 6020 s−1, respectively.

POF — Polymer Optical Fibers for Data Communication

2002 ◽  
Author(s):  
Werner Daum ◽  
Jürgen Krauser ◽  
Peter E. Zamzow ◽  
Olaf Ziemann
Keyword(s):  
Optical Fibers ◽  
Data Communication ◽  
Polymer Optical Fibers

scholarly journals Dip coating of thin polymer optical fibers

2021 ◽  
Vol 66 ◽  
pp. 102638
Author(s):  
Andreas Evertz ◽  
Daniel Schrein ◽  
Ejvind Olsen ◽  
Gerd-Albert Hoffmann ◽  
Ludger Overmeyer
Keyword(s):  
Optical Fibers ◽  
Dip Coating ◽  
Thin Polymer ◽  
Polymer Optical Fibers

scholarly journals Distributed Static and Dynamic Strain Measurements in Polymer Optical Fibers by Rayleigh Scattering

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5049
Author(s):  
Agnese Coscetta ◽  
Ester Catalano ◽  
Enis Cerri ◽  
Ricardo Oliveira ◽  
Lucia Bilro ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Time Domain ◽  
Rayleigh Scattering ◽  
Cost Effective ◽  
Time Domain Reflectometry ◽  
Dynamic Strain ◽  
Strain Measurements ◽  
Graded Index ◽  
Optical Time ◽  
Polymer Optical Fibers

We demonstrate the use of a graded-index perfluorinated optical fiber (GI-POF) for distributed static and dynamic strain measurements based on Rayleigh scattering. The system is based on an amplitude-based phase-sensitive Optical Time-Domain Reflectometry (ϕ-OTDR) configuration, operated at the unconventional wavelength of 850 nm. Static strain measurements have been carried out at a spatial resolution of 4 m and for a strain up to 3.5% by exploiting the increase of the backscatter Rayleigh coefficient consequent to the application of a tensile strain, while vibration/acoustic measurements have been demonstrated for a sampling frequency up to 833 Hz by exploiting the vibration-induced changes in the backscatter Rayleigh intensity time-domain traces arising from coherent interference within the pulse. The reported tests demonstrate that polymer optical fibers can be used for cost-effective multiparameter sensing.

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