This paper presents intrinsic polymer fiber (POF) sensors for high-strain applications such as the performance-based
assessment and health monitoring of civil infrastructure systems subjected to earthquake loading or morphing aircraft.
POFs provide a potential maximum strain range of 6-12%, are more flexible that silica optical fibers, and are more
durable in harsh chemical or environmental conditions. Recent advances in the fabrication of single mode POFs have
made it possible to extend POFs to interferometric sensor capabilities. Furthermore, the interferometric nature of
intrinsic sensors permits high accuracy for such measurements. Measurements of the mechanical response of the sensor
at various strain rates are presented. Several cleaving methods were also tested in order to appropriately cleave POFs for
coupling purposes. In addition, the design of a time-of-flight interferometer for phase measurements over the large strain
range required is discussed. Finally the bond strength between the embedded POF and various structural materials is
investigated and a methodology demonstrated for embedment of the sensors into a reinforced concrete structural component.
This paper presents intrinsic polymer fiber (POF) sensors for high-strain applications such as the performance-based
assessment and health monitoring of civil infrastructure systems subjected to earthquake loading or morphing aircraft.
POFs provide a potential maximum strain range of 6-12%, are more flexible that silica optical fibers, and are more
durable in harsh chemical or environmental conditions. Recent advances in the fabrication of singlemode POFs have
made it possible to extend POFs to interferometric sensor capabilities. Furthermore, the interferometric nature of
intrinsic sensors permits high accuracy for such measurements. Measurements of the mechanical response of the sensor
at various strain rates are presented. In addition, the design of a time-of-flight interferometer for phase measurements
over the large strain range required is discussed. Finally the bond strength between the embedded POF and various
structural materials is investigated and a methodology demonstrated for embedment of the sensors into a reinforced
concrete structural component.
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