Abstract
Performance improvements regarding high resolution optical time domain measurements recently achieved are reported. Newly developed segmented fiber sensors and fiber-reentrant-loop techniques involving optical pulse recirculation for the enhancement of resolution have been implemented on small scale flexible structures. A three-segment sensor has been tested in both tension and compression on a clamped cantilever beam. The resolution enhancement concept using fiber-reentrant loops has been verified through experiments conducted with fibers attached to the same beam. Speed limitations are investigated to identify potential hardware modifications necessary to make these techniques feasible in the near future.
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