Logo image
Back
NDE technique for ceramic composites using embedded sapphire optical waveguides
Conference proceeding

NDE technique for ceramic composites using embedded sapphire optical waveguides

Mahmoud A El-Sherif, Jianming Yuan and Jian-Min Yuan
Proceedings of SPIE, v 2944(1)
15 Nov 1996
DOI: https://doi.org/10.1117/12.259054

Abstract

Advanced ceramic composites with complex architecture have stimulated interest in innovative embedded fiber optic sensors for in-situ real-time characterization of the structure. Careful selection of a compatible optical fiber material and an inexpensive signal detection technique are most critical factors for successful incorporation of these embedded sensors. The focus of this paper is two-fold. The first reports on the development of a novel optical waveguide consisting of sapphire fiber core and polycrystalline alumina cladding, and how can these fibers be embedded into ceramic composites. The second aspect of this paper is devoted to the application of a novel inexpensive and sensitive signal detection technique, namely, the spatial intensity modulation technique to sapphire optical fibers. This technique is applicable to multimode fibers. It is based on modal power distribution modulation under external perturbations. A theoretical model has been developed to correlate variations in the modal power within multimode optical fibers to the changes induced in the state of the hosting material. Numerical results obtained from the model are shown to be in agreement with experimental observations. This paper provides a novel means to characterize high temperature composites using multimode sapphire optical waveguides.

Metrics

11 Record Views
3 citations in Web of Science
3 citations in Scopus

Details

InCites Highlights

Data related to this publication, from InCites Benchmarking & Analytics tool:

Web of Science research areas
Materials Science, Characterization & Testing
Optics
Logo image