A fiber-optic epoxy cure monitoring technique by using a wavelength-swept laser

Hyunjin Kim; Dae-gil Kim; Umesh Sampath; Minho Song

doi:10.1117/12.2184446

1 July 2015 A fiber-optic epoxy cure monitoring technique by using a wavelength-swept laser

Hyunjin Kim, Dae-gil Kim, Umesh Sampath, Minho Song

Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96553V (2015) https://doi.org/10.1117/12.2184446
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

Abstract

An epoxy cure monitoring system has been constructed by combining fiber grating sensors and Fresnel reflection monitoring. The sensors measure strain and refractive index variations during the curing process, indicating the onset of gelification, the progress, and the end of curing. We used a wavelength-swept laser source to address both types of sensors. The signals from different sensors could be easily separated, resulting in simple optical setup and increased efficiency. The fiber grating sensors are demodulated by a spectrometer. The output fluctuation in the Fresnel reflection was compensated by referencing it with the tapped output of light source.

Citation Download Citation

Hyunjin Kim, Dae-gil Kim, Umesh Sampath, and Minho Song "A fiber-optic epoxy cure monitoring technique by using a wavelength-swept laser", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96553V (1 July 2015); https://doi.org/10.1117/12.2184446

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