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==Project Description==
PHOSFOS (Photonic Skins For Optical Sensing) <ref>http://www.phosfos.eu/</ref> aims to develop a flexible and stretchable foil or skin that integrates the optical sensing elements with optical and electrical devices as well as onboard signal processing and wireless communications. This flexible skin can be wrapped around, embedded in, attached and anchored to irregularly shaped and/or moving objects or bodies and will allow quasi-distributed sensing of mechanical quantities such as deformation, pressure, stress or strain <ref>http://spie.org/x38859.xml?highlight=x2406&ArticleID=x38859</ref>. This approach potentially gives a significant advnatage over conventional sensing systems because of the portablility of the resulting systems and the extended measurement range.
The sensing technology is based around sensing elements called [[Fiber Bragg Grating]] (FBGS) that are fabricated in standard single core silica fibers, highly birefringent [[Microstructured fiber]] (MSF) and [[Polymer fibers]] (POF). The silica MSFs will be designed to exhibit almost zero temperature sensitivity to cope with the traditional temperature cross-sensitivity issues of conventional fiber sensors. These specialty fibers are being modeled, designed, fabricated within the programme. FBGS written in POF fibers will also be used since their length can be stretched up to 300% before breaking. This allows them to be used under conditions that would normally result in catastrophic failure of other types of strain sensors.
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