| Autor: |
Konrad Jakubowski, Wiebke Kerkemeyer, Edith Perret, Manfred Heuberger, Rudolf Hufenus |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Materials & Design, Vol 196, Iss , Pp 109131- (2020) |
| Druh dokumentu: |
article |
| ISSN: |
0264-1275 |
| DOI: |
10.1016/j.matdes.2020.109131 |
| Popis: |
Luminescent polymer optical fibers provide a flexible platform for sensor applications. Photoluminescent liquid-core polymer optical fibers (LiCo-POFs), produced by a co-extrusion of a low refractive index semi-crystalline fluoropolymer sheath with a glycerol core, are presented. Substituting a POF's solid polymer core with a transparent liquid yields luminescent waveguides with extra mechanical flexibility, enabling unique applications like strain sensing. Light conversion and guidance in LiCo-POFs were both achieved simultaneously by doping of the glycerol core with a fluorescent dye. X-ray analysis showed a strong impact of drawing on fiber sheath morphology, and in consequence on both mechanical and optical properties: as the molecular orientation of the sheath increases, tensile strength improves and light attenuation decreases. Excessive drawing leads to micro-voids in the sheath material, causing light scattering, which negatively affects both attenuation and light-conversion. It has been found that both the sheath structure and the sheath and core cross-sectional areas are important design parameters regarding the mechanical and optical performance of LiCo-POFs. A novel principle of an optical strain sensor based on self-absorption peak-shifts is demonstrated; it allows detection of sub-millimeter displacements, both in a reversible elastic as well as in an irreversible inelastic sensor range. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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Full Text from ScienceDirect