ACTA

Comparison of Bragg and Polarimetric Optical Fiber Sensors for Stress Monitoring in Composite Materials

A.W. Domanski^a, P. Lesiak^a, K. Milenko^a, D. Budaszewski^a, M. Chychlowski^a, S. Ertman^a, M. Tefelska^a, T.R. Wolinski^a, K. Jedrzejewski^b, L. Lewandowski^b, W. Jasiewicz^b, J. Helsztynski^b and A. Boczkowska^c
^aFaculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland
^bFaculty of Electronics and Information Technology, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland
^cFaculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland

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Composite structures are made of two or more components with significantly different physical or chemical properties and they remain separate and distinct in a macroscopic level within the finished structure. This feature allows for introducing optical fiber sensors into the composite material. These sensors can demonstrate stress distribution inside tested material influenced by external tensions. Two types of the optical fiber sensors are used as the 3D structure. One of them is based on application of fiber Bragg grating inside the core of the fiber. Longitudinal stress changes parameters of the Bragg grating and simultaneously, spectral characteristics of the light transmitted through the fiber. The second one is based on application of highly birefringent fibers which, under external stress, introduce polarization changes of the output light.

DOI: 10.12693/APhysPolA.116.294
PACS numbers: 42.81.Gs, 42.81.Pa, 62.23.Pq