Journal article
Annular Cavity Design for Photoluminescent Polymer Optical Fiber Sensors
We present optimization results on the design of a polymer optical fiber single point sensor suitable for photoluminescence-based sensing. The single point sensing design consists of one or two annular cavities, separated by a small distance, milled into the fiber and subsequently filled with a thick solution of polymer, solvent, and photoluminescent molecules, which is then allowed to dry.
The design is tested by varying the depth and length of a single cavity and utilizing two cavities with varying separations. Results from experiments show a maximum response at a separation of 2 mm for which we present an analytical explanation. A geometrical, numerical simulation model, taking into account both skew and meridional rays, is developed and shows very good agreement with the experimental results.
The fiber design presents a general platform that has the potential for the fabrication of multi-point photoluminescent sensors, for which it is necessary to have several points along the fiber functionalized for sensing. Furthermore, the approach with polymer fibers and polymer sensing gels allows for a robust integration of the sensing matrix and the optical fiber, more so than is possible using glass optical fibers.
Language: | English |
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Publisher: | MDPI |
Year: | 2020 |
Pages: | 5199 |
ISSN: | 14243210 and 14248220 |
Types: | Journal article |
DOI: | 10.3390/s20185199 |
ORCIDs: | Inglev, Rune , Janting, Jakob and Bang, Ole |