9 May 2012 Toward the implementation of flexible sensing sheet with fibre Bragg grating sensing elements
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Proceedings Volume 8439, Optical Sensing and Detection II; 843906 (2012); doi: 10.1117/12.922831
Event: SPIE Photonics Europe, 2012, Brussels, Belgium
Optical sensing sheets, based on Fibre Bragg Grating (FBG) sensing elements embedded in exible polydimethyl- siloxane (PDMS), are produced and tested. The device shows promise in pressure mapping and tactile applications, in fields such as robotics and rehabilitation. FBGs inscribed in highly-birefringent photonic crystal fibres, reflecting two Bragg peaks, are used, and the potential to discriminate pressure and temperature is explored. The prototypes were produced by moulding technology and PDMS was cured at room temperature. One sample with FBGs embedded in the middle layer of a 2 mm thick PDMS sheet exhibited a linear pressure sensitivity of about 2:6 pm/kPa over the range of 0 - 250 kPa. Another sample was proposed and tested for temperature insensitive measurements, by realising local stress concentration at FBG sections of the embedded fibre.
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Chunxiao Yan, Eleonora Ferraris, Dominiek Reynaerts, "Toward the implementation of flexible sensing sheet with fibre Bragg grating sensing elements", Proc. SPIE 8439, Optical Sensing and Detection II, 843906 (9 May 2012); doi: 10.1117/12.922831; https://doi.org/10.1117/12.922831

Fiber Bragg gratings

Temperature metrology



Optical sensing

Refractive index

Optical components

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