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* Silica [[microstructured fiber]]s for temperature-insensitive optical sensors - a new pressure-sensitive and temperature-insensitive optical fibre sensor has been developed. The sensor uses a [[fiber Bragg grating]] written into a [[microstructured fiber]]. The pressure sensitivity exceeds the state-of-the-art with a factor of 20, whilst the sensor is truly temperature-insensitive. The sensor is based on a novel design of a highly birefringent (10<sup>−3</sup>) microstructured optical fibre sensor that is designed to have a high pressure sensitivity (3.3 pm/bar), whilst at the same time exhibit negligible temperature sensitivity (10<sup>−2</sup> pm/K). The fabrication method is compatible with conventional ultraviolet grating inscription setups for [[fiber Bragg grating]] manufacture. The temperature insensitivity was achieved by tailoring the design of the doped region in the core of the [[microstructured fiber]] via a series of design iterations.<ref>http://www.phosfos.eu/eng/Phosfos/Facts-Results/Fact-sheet-01-Silica-Microstructured-Optical-Fibre-Sensor</ref>
* Embedded optoelectronic devices - the possibility to integrate optical sources and photodetectors, compatible with the optical fibre sensors has been developed within the PHOSFOS project. The optoelectronic components are
* Integrated sensors and optoelectronics - several different approaches for embedding optical fibre sensors in a flexible and stretchable host material, including injection molding, laser structuring, and soft lithography were considered. The influence of the embedding process was studied for silica and polymer [[fiber Bragg gratings]]. Temperature, humidity, strain, curvature and pressure sensitivities were fully characterized for different flexible host materials. An approach in which the embedded optoelectronic chips can be efficiently coupled towards the optical fiber sensors, using dedicated coupling structures, incorporating a 45˚ micromirror, as well as a fiber alignment groove was proposed. This allowed low cost components to be used in combination with well-established fabrication technologies, to demonstrate a truly low cost fully integrated sensing foil for biomedical applications.<ref>http://www.phosfos.eu/eng/Phosfos/Facts-Results/Fact-Sheet-03-Integrating-Sensors-and-Opto-electronics-in-Flexible-Materials</ref>
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