PHOSFOS: Difference between revisions

Revision as of 16:30, 6 June 2010

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==Key results so far==

[[File:NoiseGratingsZR.jpg|thumbnail|right|400px|Figure 2: Scattering of HeNe laser light from noise gratings recorded in PMMA using a 325 nm HeCd laser]]

[[File:Fabric with embedded POF sensors.jpg|thumbnail|right|400px|Figure 13: 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]]

Latest results can be found on the PhosFOS EU webpage [http://www.phosfos.eu/index.php/eng/Phosfos/Conferences-and-Presentations] and include 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>.

One of the early results from the project was the successful demonstration of a repeatable method of joining the polymer fiber to standard silica fibre. This was a major development and allowed for the first time POF Bragg gratings to be used in real applications outside of the optics lab. One of the first uses for these sensors was in monitoring the strain of tapestries <ref>http://eprints.soton.ac.uk/68650/01/137_Lennard.pdf</ref> shown in Figure 13, <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 the polymer devices are much more flexible they do not distort the material as much and therefore give a much most accurate measurement of the strain in flexible materials. 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>.

Other recent progress includes the demonstration of birefringent photonic crystal fibers with zero polarimetric sensitivty to temperature <ref>http://www.phosfos.eu/index.php/eng/Phosfos/Journals/Birefringent-photonic-crystal-fibers-with-zero-polarimetric-sensitivity-to-temperature</ref>, and a successful demonstration of transversal load sensing with fibre Bragg gratings in microstructured optic fibers <ref>http://www.phosfos.eu/index.php/eng/Phosfos/Journals/Transversal-Load-Sensing-with-Fiber-Bragg-Gratings-in-Microstructured-Optical-Fibers</ref>.