Side Illumination Behavior and Mechanical Properties of Twisted End-emitting Polymer Optical Fiber Bundles

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F24%3A00012538" target="_blank" >RIV/46747885:24410/24:00012538 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1002/mame.202400301" target="_blank" >https://doi.org/10.1002/mame.202400301</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/mame.202400301" target="_blank" >10.1002/mame.202400301</a>

Result language

angličtina

Original language name

Side Illumination Behavior and Mechanical Properties of Twisted End-emitting Polymer Optical Fiber Bundles

Original language description

In this work, the twisted EEPOF bundles were successfully fabricate with the aim of expanding the application of optical fibers in textiles. The initial modulus E values of all EEPOFs bundles are lower than those of the individual EEPOFs, and the post-torsional flexibility is significantly increased by the increase in twist. Fracture strength variation of EEPOFs bundles supports the “optimal twisting” theory. With the increase of twist, the strength of the fiber bundle containing 10 fibers first reaches a maximum value of 81.91 MPa at 20 T/m (4.48°) and then decreases with the further increase of twist. However, for the bundle containing 15 fibers, the strength continues to decrease with increasing twist from 0-30 T/m, which can be attribute to the elongation during twisting at a fixed length that causes the strength to reach the critical value early. The side emission effect can be obtained by suppressing the total internal reflection by twisting (macro bending coupling). In addition, the two-section model LLF2 was used to fit the twisted EEPOFs bundles. Appropriate twisting reduces the attenuation of the side illumination intensity along the transmission direction, and the attenuation coefficients of twisted B10 and B15 in the first segment of the illumination behavior are minimized when the twist degree is 20 T/m. With the appropriate twisting, the angle of incidence can be improved, but excessive twisting may cause damage to the fiber cladding and leading to loss. Twisting can improve the input angle of the incident light, while the twisting degree also affects the refractive index of the core and cladding, as a single POF becomes biaxial and inhomogeneous with high optical anisotropy after the application of twist. However, the inhomogeneity of the twisted transmission and therefore the propagation of light in twisted fibers is more complex than expected. Therefore, for B10, the optimal twist angle β may be 5.83° or greater (30 T/m), while for B15 is 4.90° (20 T/m). The 10 and 15 optimally twisted end-emitting fiber bundles are still in the middle of the range when compared to commercially available 2 mm side-emitting fibers. To be included, this work successfully provides an alternative to obtain the enhanced side-illuminated end emitting optical fibers via twisting method. The side illumination of the twisted EEPOF bundles are comparable to other POF-incorporated textiles. We believe the work significantly benefits the application of EEPOF in textile industry.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20500 - Materials engineering

Project

<a href="/en/project/EF16_019%2F0000843" target="_blank" >EF16_019/0000843: Hybrid Materials for Hierarchical Structure</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Macromolecular Materials and Engineering

ISSN

1438-7492

e-ISSN

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Volume of the periodical

310

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

17

Pages from-to

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UT code for WoS article

001345067800001

EID of the result in the Scopus database

2-s2.0-85207534789