11 April 2013 A chirped long period grating sensor for monitoring flow direction and cure of a resin
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Abstract
A continuously chirped long period grating (CCLPG) was used to perform directional flow sensing of a UV-cured epoxy resin and to subsequently monitor the resin cure via the measurement of the change in refractive index. The asymmetric nature of the CCLPG led to a change in the shape of the attenuation bands of the transmission spectrum dependent on the direction of flow of the resin along the fibre. The transmission spectrum of a CCLPG was monitored during the resin cure and exhibited a wavelength shift of 1.1 ± 0.1 nm. The change in the refractive index of the resin during cure was determined in the same experiment using a fibre optic Fresnel based refractometer, and correlated well (correlation coefficient 97 %) with the response of the CCLPG.
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Rebecca Y. N. Wong, Rebecca Y. N. Wong, Edmond Chehura, Edmond Chehura, Stephen W. James, Stephen W. James, Ralph P. Tatam, Ralph P. Tatam, } "A chirped long period grating sensor for monitoring flow direction and cure of a resin", Proc. SPIE 8693, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2013, 86930E (11 April 2013); doi: 10.1117/12.2009369; https://doi.org/10.1117/12.2009369
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