PHOSFOS: Difference between revisions

Revision as of 22:00, 20 February 2021

Revision as of 00:11, 21 February 2021

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[[File:NoiseGratingsZR.jpg|thumbnail|right|400px|Figure 3: Scattering of HeNe laser light from noise gratings recorded in PMMA using a 325 nm HeCd laser]]

A summary of the key developments can be found on the PhoSFOS EU webpage [https://web.archive.org/web/20111126031453/http://www.phosfos.eu/eng/Phosfos/Facts-Results] and includeincludes the demonstration of a fully flexible opto-electronic foil.<ref>Fully flexible opto-electronic foil, E. Bosman, G. Van Steenberge, I. Milenkov, K. Panajotov, H. Thienpont, J. Bauwelinck, P. Van Daele, Journal of Selected Topics in Quantum Electronics, 2010</ref>

Figure 3 shows the [[scattering]] of HeNe [[laser]] light from noise gratings recorded in [[Poly(methyl methacrylate)|PMMA]] using a 325&nbsp;nm HeCd laser.

One of the early results from the project was in developing a repeatable method for joining polymer fiber to standard silica fiber — a major development that enabled using POF Bragg gratings in applications outside an optics lab. One of the first uses for these sensors was in monitoring strain in tapestries<ref>http://eprints.soton.ac.uk/68650/01/137_Lennard.pdf</ref> shown in Figure 4,.<ref>http://spie.org/x39927.xml?ArticleID=x39927</ref> In this case conventional electrical strain sensors and silica fiber sensors were shown to be strengthening the tapestries in areas where they were fixed. Because polymer fibre devices are much more flexible they did not distort the textiles as much, permitting more accurate measurement of strain.

<!-- Deleted image removed: [[File:Fabric with embedded POF sensors.jpg|thumbnail|right|400px|Figure 4: Digital image correlation (DIC) image of the strain field in a fabric fitted with polymer optical fiber (POF) and silica gratings under a load of 20N, using dimethyl cyclosiloxane (DMC) and Araldite adhesive. FBG: Fiber Bragg grating. Si: Silicon. N: Newtons. MPa: Megapascals]] -->

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[[File:Fabric with embedded POF sensors.jpg|thumbnail|right|400px|Figure 4: Digital image correlation (DIC) image of the strain field in a fabric fitted with polymer optical fiber (POF) and silica gratings under a load of 20N, using dimethyl cyclosiloxane (DMC) and Araldite adhesive. FBG: Fiber Bragg grating. Si: Silicon. N: Newtons. MPa: Megapascals]]

Temperature and humidity sensing using a combined silica / POF fiber sensor has been demonstrated.<ref>Optical fibre temperature and humidity sensor, C. Zhang, W. Zhang, D.J. Webb, G.D. Peng, Electronics Letters, 46, 9, pp643-644, 2010, {{doi|10.1049/el.2010.0879}}</ref> Combined strain, temperature and bend sensing has also been shown.<ref>Bragg grating in polymer optical fibre for strain, bend and temperature sensing, X. Chen, C. Zhang, D.J Webb, G.-D. Peng , K. Kalli, Measurement Science and Technology, 2010</ref> Using a fiber Bragg grating in an eccentric core polymer has been shown to yield a high sensitivity to bend.<ref>Highly Sensitive Bend Sensor Based on Bragg Grating in Eccentric Core Polymer Fiber, X. Chen, C. Zhang, D.J. Webb, K. Kalli, G.-D. Peng, A. Argyros, IEEE Sensors Journal, 2010</ref>