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Polymer Optical Fibers are proposed for the monitoring of structural health condition of energetic materials in solid rocket motors. This photonic solution provides the necessary electromagnetic immunity and inherent electrical safety characteristics in the highly explosive environment of SRM's propellant. Furthermore the use of POF's intrinsic elasticity in contrast to silica fibers makes possible the monitoring of excessive strains apparent in the behavior of the energetic propellant. Both jacketed and unjacketed fibers were employed demonstrating excellent strain transfer characteristics able to monitor consistently propellant's behavior under strain.

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Hydrophones based on optical fiber technology are a promising alternative to ceramic detectors, when immunity to electromagnetic noise and low electromagnetic signature are a key requirement. In the present paper we analyze both through multi-physics finite element modeling via COMSOL Multiphysics and experimental test in an equipped pool some sensor configurations with the aim of developing quite inexpensive hydrophones for application in navigation of autonomous underwater vehicles