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31 August 2000 All-fiber optoelectronic sensor with Bragg gratings for in-situ cure monitoring
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Proceedings Volume 4074, Applications of Optical Fiber Sensors; (2000)
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom
Real-time, in situ monitoring for quality control of the polymer cure process is of high interest, since thermoset polymer-matrix composite are widely used in large industrial areas: aeronautical, aerospace, automotive and civil due to their low cost/low weight features. However, their final properties are strongly dependence on the processing parameters, such as temperature and pressure sequence. The key-point for advanced composite materials is the possibility to have distributed and simultaneous monitoring of chemoreological and physical properties during the cure process. To this aim, we have developed and tested an optoelectronic fiber optic sensor based on the Fresnel principle able to monitor the variations of the refractive index due to the cure process of an epoxy based resin. Experimental results have been obtained on sensor capability to monitor the cure kinetics by assuming the refractive index as reaction co-ordinate. The integration with in-fiber Bragg grating in order to measure the local temperature has been discussed and tested.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andrea Cusano, Giovanni Breglio, Antonello Cutolo, Antonio Maria Calabro, Michele Giordano, and Luigi Nicolais II "All-fiber optoelectronic sensor with Bragg gratings for in-situ cure monitoring", Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000);

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