A chirped long period grating sensor for monitoring flow direction and cure of a resin

Rebecca Y. N. Wong; Edmond Chehura; Stephen W. James; Ralph P. Tatam

doi:10.1117/12.2009369

11 April 2013 A chirped long period grating sensor for monitoring flow direction and cure of a resin

Rebecca Y. N. Wong, Edmond Chehura, Stephen W. James, Ralph P. Tatam

Proceedings Volume 8693, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2013; 86930E (2013) https://doi.org/10.1117/12.2009369
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

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.

Citation Download Citation

Rebecca Y. N. Wong, Edmond Chehura, Stephen W. James, and 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); https://doi.org/10.1117/12.2009369

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