Three-dimensional FEM model of FBGs in PANDA fibers with experimentally determined model parameters

Markus Lindner; Barbara Hopf; Alexander W. Koch; Johannes Roths

doi:10.1117/12.2263261

23 April 2017 Three-dimensional FEM model of FBGs in PANDA fibers with experimentally determined model parameters

Markus Lindner, Barbara Hopf, Alexander W. Koch, Johannes Roths

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103232A (2017) https://doi.org/10.1117/12.2263261
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

A 3D-FEM model has been developed to improve the understanding of multi-parameter sensing with Bragg gratings in attached or embedded polarization maintaining fibers. The material properties of the fiber, especially Young's modulus and Poisson's ratio of the fiber's stress applying parts, are crucial for accurate simulations, but are usually not provided by the manufacturers. A methodology is presented to determine the unknown parameters by using experimental characterizations of the fiber and iterative FEM simulations. The resulting 3D-Model is capable of describing the change in birefringence of the free fiber when exposed to longitudinal strain. In future studies the 3D-FEM model will be employed to study the interaction of PANDA fibers with the surrounding materials in which they are embedded.

Citation Download Citation

Markus Lindner, Barbara Hopf, Alexander W. Koch, and Johannes Roths "Three-dimensional FEM model of FBGs in PANDA fibers with experimentally determined model parameters", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103232A (23 April 2017); https://doi.org/10.1117/12.2263261

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