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Cement mortars prepared with steatite particles have been investigated for restoration of sculptures and other craftworks. This work investigates the addition of a thermoset polymer into cement-based composites reinforced with residues of steatite particles in order to seal the open pores, reduce water penetration and thus enhancing the material's lifetime. A full factorial design of 2 1 4...
The paper have demonstrated application of an adaptive interferometer based on population gratings in erbium-doped fiber (EDF) for the detection of laser-generated ultrasonic displacements in 20 MHz frequency band. Such interferometer can be particularly attractive for industrial applications because it can be implemented as a simple and robust all-fiber system based on commercial components only.
Simplified schematic of an all-fiber adaptive interferometer in a two-wave mixing (TWM) configuration is applied for detection of mechanical vibrations. This experiment used OFS-Fitel single-mode Er-doped optical fiber HG980. To improve the adaptive properties of the interferometer more, optical pumping of the Er-doped fibers (at 980 nm) could be done, or rare-earth doping elements with shorter spontaneous...
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