Abstract

In this work, a high-index silica-based fiber-optic mini-bundle sensor was constructed and implemented with a Fourier transform near-infrared spectrometer in the spectral region from 10 000 to 4500 cm-1. The refractive index of the multimode step index fiber was 1.618. This arrangement allows the propagation of waveguiding modes when the sensor is immersed in most resin systems. The reactions of a polyisocyanurate resin system and an epoxy resin system were monitored and peak assignments were made and discussed with respect to their potential for use in real-time analysis to be applied to cure control. Last, cure monitoring with this sensor was successfully demonstrated in a glass-reinforced resin transfer molded epoxy part.

Fiber-optic epoxy composite cure sensor. II. Performance characteristics

Kai-Yuen Lam and Martin A. Afromowitz
Appl. Opt. 34(25) 5639-5644 (1995)

Long-period gratings for monitoring the resin transfer molding of fiber-reinforced polymer composites

T. Allsop, M. W. Tahir, K. Bhavasar, L. Zhang, and D. J. Webb
Opt. Lett. 48(13) 3503-3506 (2023)

Contactless optoelectronic technique for monitoring epoxy cure

Andrea Cusano, Vincenzo Buonocore, Giovanni Breglio, Antonio Calabrò, Michele Giordano, Antonello Cutolo, and Luigi Nicolais
Appl. Opt. 39(7) 1130-1135 (2000)

Determination of bacterial activity by use of an evanescent-wave fiber-optic sensor

M. Shelly John, Anil Kishen, Lim Chu Sing, and Anand Asundi
Appl. Opt. 41(34) 7334-7338 (2002)

Preparation and properties of a high refractive index optical resin prepared via click chemistry method

Chaoyun Luo, Jiandong Zuo, Yanchao Yuan, Xuechun Lin, Feng Lin, and Jianqing Zhao
Opt. Mater. Express 5(3) 462-468 (2015)