J0440401 Development of Measurement System of Degree of Cure by Optical Fibers with Bending Loss Compensation

Abstract

In the present paper, we developed measurement system of degree-of cure of FRP laminates using optical fiber sensors with bending-loss compensation. Two SLD light sources whose center wavelengths are 1310nm and 1550nm were used. The combined sensor of a Fresnel-based refractive-index sensor and an FBG sensor were employed for measuring degree-of-cure and strain. The optical intensity measured by the 1310nm light was compensated by the optical loss of the 1550nm light. The experimental results showed that the optical loss of the 1310nm light by local bending was compensated successfully by the proposed method.